The design is the upgrading of the existing elevator monitoring system, which has realized the recording and data acquisition of the elevator working state. And it has also realized the dynamic showing on local display and real-time processing on remote monitoring platform. The whole system includes two main components, which are data collecting from lower machine and monitoring software on the server. The lower computer gathers the parameters of PLC and inverter of the spot elevator and the parameters are sent to the specified port of the server through H7710(GPRS module). The data is received with Apache MINA framework and stored in oracle database. PC monitoring software adopts B/S mode. According to the granted permissions, users can deal with the operation of remote monitoring, information querying and alarm processing to the equipments of their companies. Practical applications prove that the monitor system is stable in performance and the design method is reasonable. It can be widely used in the field of elevator monitoring.