This journal aimed to answer the problems encountered from carrying out measurements and inspections of electrical substations that still have problems including limited technicians in making measurements, writing errors often occur in measurement results, and the accuracy of the data from the calculation results that are sometimes not under operational standards at PT Haleyora Powerindo Merauke as part of PT PLN (Persero) in Merauke area. Data collection carried out in this journal is by interview, observation, literature study, with system development methods using the Waterfall method. The results of application testing show that Applications can display information about the results of measurements at each substation and transformer with accurate data because measurements are carried out in real-time. This application also provides information on substation inspections where at each inspection of this substation, this application can help technicians in measuring and inspecting substations, Reporting process results of measurements and inspections on substations and transformers can be reported directly to PT PLN (Persero) as the supervisor quickly while the area is still affordable by the internet network.