The circulation rate of the library needs to be evaluated and determined according to the actual situation. According to the data of American Public Library Association, the circulation rate of a good public library should be more than twice the total amount of borrowed collections every year. This means that if a library has 10000 books every year, its circulation rate should exceed 20000 times. However, the circulation rate of libraries should be evaluated and determined according to the actual situation, because different types and scales of libraries have different standards and objectives. To reach the standard of circulation rate, we should evaluate and judge it on the basis of comprehensive consideration of the specific situation and needs of the library and combined with the relevant indicators of the library.