At present, the social environment in which university libraries provide information services and the complexity and diversity of information users put forward greater challenges and higher quality requirements for the information services of university libraries. The concrete manifestations are as follows: First, from the perspective of the information guarantee demand of teaching and research literature in colleges and universities and the improvement of the information service level of teaching and research literature, the information service level provided by university libraries is far from meeting the needs of the development of teaching and research in colleges and universities. Secondly, from the perspective of users' cultural information needs and social knowledge ability innovation, the information service of university libraries needs to innovate the original service model to meet users' practical application needs and social needs. Especially in the context of the current financial crisis, with the intensification of the pressure of knowledge competition, ability competition and employment competition in real social life, it is more necessary for the library information service model to realize the transfer from information service center to knowledge service center. Thirdly, from the perspective of local economic development, scientific research level and cultural informatization construction, the information service of university libraries has a slightly insufficient role in promoting local economic scientific research development and cultural informatization construction. For many years, university libraries have been serving as university literature information centers, providing literature information retrieval and consulting services for university teaching and scientific research. Its customers are mainly teachers, students and researchers. Due to the lack of horizontal contact with local governments, the social efficiency of their information services is limited. In today's knowledge economy society, knowledge benefit, economic benefit and social benefit are closely related. Only by changing and deepening functions, expanding service channels and promoting local economic, cultural and social development can information services further reflect their own value-added, that is, realizing knowledge innovation in knowledge services and serving local economic and social development.

With the challenge of modern information technology environment to information service and the impact of knowledge economy on information service, library information service in the traditional sense is transitioning to knowledge service. In the past, our understanding of information service was its starting point, the key point and the end point were the acquisition and transmission of information, and the evaluation standard was "whether the library provided users with the information and documents they needed". Today's knowledge service requires dynamic search, selection, analysis and utilization of all kinds of information and knowledge according to users' needs. It is a leading research activity, its essence is the process of knowledge innovation, and its value can be realized by significantly improving users' knowledge application and knowledge innovation efficiency. Therefore, the focus and final evaluation of knowledge service is not how many documents and information products are provided to users, but whether the library helps users find the knowledge needed to solve problems through services, which has brought certain economic and social benefits to society. In other words, information service can only reflect the purpose value of information service by combining users' information needs and solving practical problems, which is the realization process of library knowledge service. Therefore, in knowledge information service, we should not only pay attention to the process of user information resource construction and user information utilization, but also pay attention to the realization process and effect of user information purpose. Based on this, we think that in today's knowledge economy society, the knowledge information service of university libraries under the network environment and modern technical economy environment needs to make full use of existing library resources, that is, enrich cultural information resources, knowledge resources, network resources, technical resources, equipment resources and human resources, and build a new information service model-information practical platform service model, in order to solve the practical problems of users and realize the value-added of information services.

Second, the current situation and existing problems of information services in university libraries under the network environment

Since the late 1990s, with the rapid development and update of modern information technology such as computer network technology, remote communication technology and multimedia technology, the information service of university libraries has gradually become diversified, functional, networked, digital, remote, integrated and intelligent. Under the environment of knowledge economy, promoted by various technical means and service means, university libraries are currently in the stage of digital development, and the service function of libraries is also changing from information service to knowledge service. However, in the process of investigating and understanding the information service of university libraries in China, we found that in recent years, although the information service construction and information service functions of various universities have been continuously expanded and extended, the information service effect of university libraries is still unsatisfactory. As we all know, users are the main body of library information service, and the information service of university library should closely focus on the actual needs of university users. It is true that in recent years, relying on the advantages of network technology and modern information technology environment, university libraries have developed a variety of service modes, such as online public catalog query, digital reference service, virtual reading room reading, network reference service, network database service, reader-assisted service, information resource navigation, and unified platform cross-database literature retrieval. The complementary implementation and concrete application of these service modes have really promoted the further realization of library service functions. However, judging from the practical design of service system and the performance evaluation of interactive service in the development of teaching and scientific research in colleges and universities, it seems that there is not much research on library service. It is precisely because of the lack of understanding of these aspects that the information service effect of university libraries in school teaching and scientific research is not ideal at this stage. The reason is that university libraries ignore the most basic service functions in the process of information service, and focus on the construction of library literature resources and the expansion of service functions.

As Ranganathan, an Indian library scientist, described the five laws of library science, the information service of the library is not established for resource construction, but to meet the actual needs of users and achieve practical results. In other words, realizing users' knowledge innovation is the fundamental starting point and final destination of information service in university libraries at this stage. At present, the service status of university library is not consistent with the vision of library service. In the article "Research on Personalized Information Services of University Libraries under the Network Environment" (Gao Jie, 2008), this paper compares and analyzes the personalized information services of seven subordinate university libraries in Hubei Province, among which Wuhan University and Huazhong University of Science and Technology are among the 2 1 1 Project and 985 Project; Five other universities, including Huazhong Normal University, Wuhan University of Technology, China Geo University (Wuhan), Zhongnan University of Economics and Law and Huazhong Agricultural University, are also included in the 2 1 1 project. Therefore, the information service status of these seven university libraries represents the high-end level of information service development of university libraries in China. From the comparative analysis, it can be seen that the personalized service systems of these seven university libraries not only have basic information services such as the latest trends, related links, user training, featured collection databases, new book reports, collection catalog retrieval, etc., but also generally provide interfaces with library automation systems, which can directly consult library catalogs and query users' borrowing records. Each system has developed some new service functions according to the individual needs of users, but some functions need to be further improved in terms of intelligence and information service of teaching and scientific research in colleges and universities. For example, from the homepage of the above-mentioned university library, we don't see the service function module related to teaching and scientific research in universities, but we can see the development of this service function on the homepage of individual libraries such as Suzhou University. But it is also limited to retrieval teaching, online papers, teaching courseware, SCI source journals, CSSCI, Chinese core journals, submission guides, etc. University library is an important part of school teaching and scientific research. According to the needs of teaching and scientific research, collect, sort out and provide all kinds of literature information in time to serve teachers and students. The quality level and scientific research ability of information users in university libraries are closely related to the development and play of library information service functions.

Through the above investigation and analysis of the current situation of information service in university libraries, we find that the user information service in the information service mode of university libraries under the network environment is not satisfactory in terms of the ability to master user information or the actual effect of user information. Mainly manifested in the following aspects: the user's innovation ability is insufficient; Insufficient user knowledge development ability; The user's scientific research ability is insufficient; The user's autonomous learning ability is insufficient. There are two fundamental reasons: first, there is a phenomenon of "emphasizing construction over practicality" in library information service management. The so-called "emphasizing construction over practicality" means that in the knowledge economy environment, library information service only pays attention to the construction and dissemination of library knowledge information resources, while ignoring the actual contribution value and social contribution rate of user information, which is not conducive to realizing the fundamental purpose of knowledge information service-knowledge innovation. It hinders the transformation from library information service to knowledge service. At the same time, it also causes the mismatch between users' information needs and social actual needs and library knowledge information services under the knowledge economy environment, as well as the disadvantages of information services being out of touch. Secondly, the phenomenon of "emphasizing development over effect" also reflects that in recent years, although university libraries have a wide range of information services, rich service contents and diverse service forms, the linkage effect between the subject and object of information services and the library as a knowledge information service provider has not been fully reflected. In the above information service survey, the universality and initiative of user participation, the feedback of user information, the interaction of users and the innovation of users lack unified coordination and braking in the whole information service management.

University library is an information distribution center, which closely focuses on the needs of school teaching and scientific research, and provides efficient and convenient information services for college students, teachers, researchers and academics from all walks of life. Its existence has played an important role in guiding information resources for higher education and social and economic development. In recent years, with the rapid development of computer network technology, digital information technology, multimedia technology and database storage technology, the content and service function of library information service have been endowed with broader and deeper meanings. The form of networked knowledge information service has been adopted by the information services of major university libraries in China today, and will become the mainstream service means for the development of library information service in the future. In today's era of knowledge economy, knowledge service is inevitable to further deepen the service function of university libraries. At present, the information service mode of university libraries in China has developed rapidly under the network environment, from the simple digital information service in the past to the various service modes now. Such as interlibrary loan/document delivery, substitute search and retrieval, reference service, sci-tech novelty retrieval, subject service, various characteristic database resources service, free Internet resources special service, etc. The cross-complementary use of various network information service modes has greatly enriched the demand for information resources services for teaching and scientific research in colleges and universities. However, in the investigation of network information service modes in colleges and universities, we also see that the number of service modes is increasing, but the feedback rate of service depth and quality is low, the actual contribution value and social contribution rate of user information are low, and the knowledge innovation ability of information users is insufficient. How to make full use of network information resources, provide knowledge service for teaching and scientific research in colleges and universities, and realize knowledge innovation is still the main topic facing the information service of university libraries at present. The author believes that the construction of information practice platform system is a good measure to further innovate the current network information service model in colleges and universities.

Thirdly, the analysis of factors affecting the realization of information service platform system.

Information service platform system is an innovative model of knowledge service in university libraries under the network environment, knowledge economy environment and modern information technology environment, and it is a new growth point of knowledge service in university libraries at this stage. Its core key lies in connecting the isolated resources of various departments in colleges and universities with the knowledge service of the library, and making use of the knowledge management service function of the library to become an interactive society that can freely enjoy information resources, realize users' knowledge innovation and realize the educational service function between the library and colleges and universities. At present, there are still some difficulties and problems in the process of constructing the information service platform system and realizing the service mode of the information service platform, such as the development and integration of resources, the technical development and utilization of the service platform module, and the practical test of the evaluation of the knowledge service effect of the library. First, in terms of resource development and integration, there are abundant teaching and research resources in colleges and universities, but they have not been fully developed, excavated, integrated and utilized by information service departments. The main reason is that many colleges and universities only pay attention to the construction and utilization of resources of various departments, ignoring the unity of colleges and universities, thus causing the phenomenon of scattered and idle knowledge resources in colleges and universities. Under the environment of network, knowledge economy and modern information technology, university libraries not only have the function of collecting literature information resources of traditional libraries, but also have the function of developing, excavating and integrating literature resources and promoting the innovation of knowledge services. At present, university libraries should take the opportunity of building an information practice platform system to develop, excavate and integrate all kinds of information resources, including the existing resources of universities, and realize the knowledge service construction of university libraries through various service forms to meet the knowledge needs and knowledge innovation needs of all users in universities. Secondly, in the development and utilization of service platform module technology, the construction of university library information service platform system is based on the development of various platform modules. Whether to develop and how to develop the quality directly affect the service effect of the library information service platform system. At present, due to the reasons of technology, experience and service concept, the construction of information service platform system of university library has not received due attention in universities. In the development of each module, most colleges and universities only pay attention to user demand, user education, resource construction and collaborative service platform development, while interactive collaborative platform, technical support platform, quality evaluation platform and unified retrieval platform are undeveloped or partially developed. With the gradual emergence of competition and pressure between knowledge economy environment and modern technology environment, the service function of university library needs to be further deepened, and the realization of user knowledge innovation has become the realistic goal of knowledge service of university library at present. In particular, it is necessary to develop service platform modules such as information interaction, technical support and quality evaluation as the driving force to promote library knowledge service and user knowledge innovation. Therefore, university libraries should attach importance to the development and research of related service modules. Thirdly, the practical test of the evaluation of the knowledge service effect of the library: the measurement of the knowledge information service effect of the university library and the user's knowledge innovation index needs a platform-the information service platform, through which users can interact and feedback information. This paper analyzes the present situation of knowledge service in university libraries and the reasons that affect the knowledge innovation of library users, objectively reveals the social information needs of users to realize knowledge innovation, improves the management mechanism of library knowledge service, and promotes and realizes the social transformation of the educational service functions of libraries and universities. At present, the service departments of university libraries are not fully aware of the effect evaluation and practice test of library knowledge service, and the work carried out in this regard is limited to superficial information feedback, without in-depth discussion and evaluation, which is also the fundamental reason for the lack of social function of knowledge service in university libraries in recent years. As far as colleges and universities are concerned, their social function is to cultivate adaptable, high-skilled and top-notch talents for the society to meet the needs of social and economic development. The knowledge service of university library is also around this core. In other words, the social contribution value of users' knowledge service is one of the important standards to measure the effect of knowledge service in university libraries.

Under the environment of network, knowledge economy and modern information technology, the information service of university library is facing challenges, such as the impact of knowledge economy on information service, the challenges of network environment and modern information technology environment. Whether university libraries can take advantage of information service competition has become an urgent problem and an important task for university libraries. Knowledge management is an effective method and tool to improve the core competitiveness of an organization by using collective wisdom. Knowledge management is to realize knowledge innovation through knowledge service. As a library, it is necessary to provide better services to support knowledge innovation. In the current environment, only by rapidly updating the service content and changing the service mode can we provide users with the quality service they really need and realize the new survival value of library service in the knowledge economy society. The information practice platform of university library meets the demand of knowledge service of university library in the era of knowledge economy and modern information environment.

The subprime mortgage crisis on Wall Street in the United States triggered a global financial crisis, which led to the chaos of the global financial order, followed by endless negative effects, such as the increasingly embarrassing social employment problem, the high global unemployment rate and other issues, and the phenomenon of economic turmoil and social crisis became increasingly obvious. China is also one of the countries suffering from it. In this socio-economic environment, colleges and universities, as one of the important bases for training talents for socio-economic development, should assume the responsibility of realizing their social functions. In the process of talent training and knowledge transfer in colleges and universities, the university library that provides knowledge information service for teaching and scientific research in colleges and universities can only cultivate talents with social adaptability, knowledge innovation, self-development and entrepreneurship for the school and society, which is the ultimate embodiment of the library's knowledge service function in the current environment. Constructing the information service platform system of university library under the network environment is an effective way to realize the knowledge service function of library.

The expansion of enrollment in colleges and universities has become one of the most frequently discussed topics in China's educational system reform in recent years. At present, there are more than 1800 colleges and universities in China, and the number of college students in 2008 has reached 6.2 million, an increase of 5120,000 compared with 10 years ago, with an average annual increase of more than 500,000. With the increasing enrollment scale of colleges and universities, the scale of college construction has expanded, which has led to the merger of some colleges and universities, the establishment of new campuses and even the blind expansion of campuses. The extensive development of expanding scale once became the mainstream of the development and construction of some colleges and universities. After the reform and opening up, due to the needs of social and economic development, the expansion of colleges and universities has made some contributions to make up for the demand for talents in social and economic development. However, due to the enrollment expansion of colleges and universities year by year, the quality of students is declining, the educational resources are tight (teachers are tight), the employment pressure is increasing, and the problems and contradictions such as the imbalance between educational development and social demand are increasingly apparent. The present situation of higher education development is not optimistic. In order to change the present situation of university development and promote the healthy and sustainable development of university construction, we need to do two things: First, we need to control the scale of university enrollment expansion. Fortunately, at the 2009 national conference on higher education enrollment plan, the enrollment plan of the college was 6.29 million, an increase of 4% over 2008. The speed of enrollment expansion in colleges and universities has slowed down significantly, and the speed of outreach development has been effectively controlled. The second is to speed up the integration of university resources and promote the connotative development of universities characterized by improving teaching quality, innovation ability and brand. This will not only help to enhance the competitiveness of China college students in society, but also meet the needs of the people and society. As a knowledge information service, university library needs to change its service function in the process of promoting the realization of social functions of universities, that is, to realize users' knowledge innovation through the strategic change from information service to knowledge service. The development of China's higher education faces many contradictions and problems, such as the quality and structure of higher education personnel training can not meet the needs of economic and social development, especially the needs of building a strong country with human resources and an innovative country. As an information service department, university library should reform the previous service concept, deepen the construction of service functions, and match the library information service mode such as information service platform system to meet the needs of university and social development.

Fourthly, the evaluation platform of the interaction effect between information service and users in university libraries under the network environment.

The platform aims to objectively, fairly and scientifically evaluate the knowledge service of university libraries by paying attention to the development effect of knowledge information resources, the innovation degree of users' knowledge and the satisfaction of social talents, so as to improve the quality and level of management and service of university libraries and promote further innovation of management and service. In the knowledge information service of university library, realizing users' knowledge innovation is the ultimate power and source of library management and service. The library is a document information center and a knowledge service institution. The realization of knowledge innovation is inseparable from the rich knowledge resources and high-quality knowledge services of the library. In the process of knowledge production, dissemination and application, knowledge innovation can be embodied by library knowledge service, and the effect of library knowledge service determines the process of library knowledge innovation. Therefore, the evaluation of the interaction effect between knowledge information service and users in university libraries under the network environment plays a key role in reflecting and promoting the knowledge innovation service of library users. It is an effective way to analyze the performance of users' knowledge service to construct an evaluation platform for the interaction effect between knowledge information service and users in university libraries. Its realization process needs to be embodied in the form of interaction and through the feedback mechanism of library knowledge service users. Including: first, the evaluation platform for the construction and development of information resources in university libraries. Its purpose is to objectively analyze the problems and measures that need to be improved in the construction and development of information resources in university libraries through users' evaluation and feedback, and to establish a matching knowledge service system of university libraries, so as to promote the service innovation of libraries in the construction and development of information resources. Second, the evaluation platform for the use effect of user information resources in university libraries. Through the feedback analysis of users on the utilization effect of library's knowledge service, this paper clarifies the main reason that affects the realization of library's service function, that is, users' knowledge innovation. In view of the problems existing in the process of library's knowledge service and users' knowledge utilization, we strive to build a more scientific and reasonable model to improve the utilization effect of users' information resources and promote the innovation of knowledge service and users' knowledge in university libraries. Third, the evaluation platform of social needs of university library users. The purpose of this paper is to evaluate and analyze the current situation of social function realization of knowledge service in university libraries through users' feedback on the social function service effect of university libraries, find out the reasons why the current university education and library knowledge service can't meet the social needs such as talent training mode and social and economic development demand, establish a library knowledge service mode that matches the social needs, and promote the effective realization of social function service in university libraries.

In the process of realizing the information service platform system of university library, it is of practical and social significance to construct an evaluation service model of the interaction effect between students' innovation, teachers' scientific research, library knowledge information service and users, and to reflect the knowledge service of university library and users' knowledge demand and utilization effect in an interactive way through the feedback mechanism of library knowledge service users. Under the network environment, knowledge economy environment and modern information technology environment, university libraries can carry out targeted management and service more effectively, and promote the realization of knowledge innovation to serve the society.

Five, the environment and conditions for the realization of the information service platform system of university library.

Relying on the network, using modern information technology as a means, using the existing software and hardware resources, literature information resources, knowledge information management resources and rich educational resources in colleges and universities, including teachers, educational management resources, laboratory construction resources and scientific research resources in colleges and universities, in line with the purpose of resource sharing, complementary functions, multi-party promotion and efficiency improvement, the library's knowledge service function and college education function are socialized in the construction and service of colleges and universities. The information service mode of university library-the implementation of information practice platform can not be separated from the cooperation and support of many departments (including users). Only by giving full play to the linkage and interaction between teaching, scientific research departments, library knowledge information service departments and users (including students, teachers, scientific researchers and other social academic researchers) can we avoid the duplication of knowledge information resources construction and the isolation of various information resources construction and services, and make use of the characteristics of diversity, intersection, enjoyment and complementarity of knowledge information to effectively realize knowledge innovation, thus promoting the development of various disciplines in the school.

Construction and utilization prospect of information service platform system of university library under the network environment of intransitive verbs.

At present, the construction of information service platform system of university library under the network environment is still in the stage of exploration and evaluation. The reason why the author puts forward this view is to arouse the concern of the library information service industry about the disharmony between the current information service and the realization of the library knowledge innovation service goal. Only by truly understanding the essence of knowledge information service under the network environment and constructing various feasible knowledge information service modes, such as information service platform mode, can we effectively promote the realization of library service function, that is, user knowledge innovation. It is believed that in the near future, with the further improvement of the level of information technology, the library's knowledge information service mode will be more perfect, the information service management will be more mature, and the knowledge service of university libraries will be more suitable for the needs of higher education development and social and economic development.