Test method, device and system of application program

The invention discloses a test method, device and system of an application program. The test method comprises the following steps: obtaining a plurality of test requests for testing a tested application program; and executing the following steps for the plurality of test requests until the execution of a test instruction corresponding to each test request in the plurality of test requests is finished: selecting a test request which is not executed from the test requests to serve as a current test request, calling an API (Application Program Interface) corresponding to the test instruction in the current test request to execute the test instruction, and returning to execute a step that one test request which is not executed is selected from the test requests to serve as the current test request in a process that the API is called to execute the test instruction. The problem of low resource use ratio of a test terminal when the application program is subjected to a performance test in the prior art can be solved, and the effect that the CPU (Central Processing Unit) resources of the test are efficiently utilized is realized.