This paper description an integrated system to computerized the electrical machines laboratory. The software program is design by using VISUAL BASIC. The power signals can be read into the computer through the data acquisition system and the I/O interface. The user can choice which course he want to exercises, and then the screen show the circuit. We can get the quantity for each experiments by using the digital algorithms from the sampling data. There are many test examples to verify the performance can be performed in significantly less time and friendly.