Abstract: The upper reservoir of Shisanling pumped storage station is located on the mountain top of Mangshan,where the geological condition is quite complex.During the station construction a large quantity of monitoring instruments were embedded.The original artificial monitoring system has worked inefficiently.In May,2002,it was rebuilt to a new automatic system suitable for its own features.Now,the system has operated normally for 3 years,simultaneously some problems needed as well for further improvement.