Under the Peru-Japan SATREPS Project, a building monitoring system has been implemented in Lima city, supported by JST and JICA. This network monitors three buildings (HERM, PC-UNI and FIC-UNI); each building has five sensors, which consist in a GMR accelerometers. These buildings have different characteristics, such as age, ground mechanic properties, structural systems, and structural status. Since the implementation of this network, some quakes have been recorded. This paper describes the implementation of the monitoring network, and presents the response of the target buildings and their dynamics characteristics during these quakes.