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A Matlab based electrical property testing system for insulating materials has been developed by selecting common equipment found in the lab in order to tackle the questions found in traditional insulation testers whose function is simple and is incompatibility with new methods such as frequency domain dielectric response. The negative effect of frequency response function bring by the system has been removed by the pre-filter in the signal generation process. Therefore, the system has not only the ability to run the normal DC and fundamental frequency test, but also to carry out the experiment under frequencies range from 50Hz to 10 kHz. The maximum testing voltage for this system is 10kV. Together with the measurement of the leakage current, the system is able to evaluate the insulating property of the material under test in a comprehensive way. The test results show that the system has reached the design target and can meet the testing needs of daily work, and achieve the purpose of developing the system.