Abstract: An automatic testing system and method are used for testing a mobile phone instead of a manual test operation. The automatic testing system uses a base station simulator and a test computer. The computer converts an operational message from the base station simulator into a test command. In the method according to the present invention, an automatic test program finds a test command corresponding to the operational message from a lookup table. The test command is then sent to the mobile phone under test and then the base station simulator validates a performance of the mobile phone by examining an execution result of the mobile phone. Test time is reduced and test correctness is enhanced for a mobile phone.