Electrochemistry is the basis of many renewable energy technologies. The understanding of electrochemical reactions at the atomic scale can help us design better renewable energy devices. There is still room to improve the accuracy and cleanliness of the existing electrochemical research platform. This project has built a set of ultra clean and high-precision electrochemical in-situ research platform. It includes atomic precision material preparation system, ultra clean test system and in-situ characterization system based on large scientific device. This subject involves interdisciplinary, including surface and Interface Science, materials science, physics, MEMS, electrochemistry, photon science and energy science.