Method, device and system of test application program interface

The invention discloses a method, a device and a system of a test application program interface, wherein the method of the test application program interface is used in an application program interface arranged on a server by a client test and comprises the following steps: S1, receiving parameter information and assertion of the application program interface through a human-computer interface of a client, S2, according to a communication protocol between the client and the server, packaging the parameter information to be interface test data which confirm to the communication protocol and sending the interface test data to the server, S3, receiving return data processed by the server, and S4, analyzing the return data through the assertion and displaying a test result through the human-computer interface. According to the method, the device and the system of the test application program interface, a tester needs not to write a test code, the test data are input through a page table and the test result can be displayed through the page table directly, and workload of the tester is lightened and accuracy is improved.