An offline debugging method for a test script is disclosed, includeing acquiring the program interface of the system under test, the program interface is encapsulated or refactored, when a functionaltest script simulating a program interface of a system under test calls a program interface of the system under test in an offline debugging environment, the call is directed to an encapsulated or refactored program interface, and receiving a return value of the encapsulated or refactored program interface, if the expected value of the test script is different from the returned value of the encapsulated or reconstructed program interface, the test script is modified to solve the problem that the debugging process of the test script depends on the test environment in the automated test processof the intelligent system, and the debugging process of the test script will cause waste of resources.