A system and method for restoring a signal test apparatus to a previous state receives a time interval set by a user to create restore point files. The signal test apparatus tests signals of a test object and creates a restore point file according to the time interval. The restore point file stores signal test data of a test object when the restore point file is created. If the signal test apparatus needs to be restored to a previous state, the signal test data of a latest restore point file are acquired. The acquired signal test data are displayed on a display of the signal test apparatus.