Hydro potential energy, new and renewable energy, really needs to be developed as an alternative resource that is very environmentally friendly, one of which is a micro hydropower plant. At this time, the control of the micro-hydro water inlet is still operated manually. This fact is a problem because it consumes too many human resources, and if done manually, the level of accuracy is also not correct. The monitoring system used previously could only be monitored near the generator and could not be monitored remotely. To overcome the problems, it is designed so that the water inlet can be controlled automatically by using an application on a smartphone. In addition, the monitoring system will also be designed and programmed so that it can be monitored anytime and anywhere through an application on a smartphone. The results show that the system that has been built can work very satisfactorily.