When medical institutions purchase, verify, and start using new medical devices (MD), they need to prepare maintenance programs to ensure normal operation of the devices. The performance of MD may deteriorate over time and the maintenance period needs to be adjusted. However, there are many types of MD with different risks to be routinely checked and maintained. A huge human power is required if all MD are to be examined anytime. Therefore, a good system is need to monitor the maintenance programs. We reviewed and revised current MD maintenance programs according to WHO's suggestions, so that statistical difference was reached between the scores of instruments with and without maintenance plans. In the future, the maintenance plans can be adjusted dynamically according to the average failure time of each device.