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This paper proposes a design scheme for the intelligent street lamp monitoring system merging wireless sensor networks, GPRS/GSM network and Internet. This system composes of a remote computer terminal, a mobile, a wireless gateway and some street lamp nodes. In intelligent mode, the street lamps can be put on or off, or be adjusted the brightness automatically according to the surrounding environmental illumination. In control mode, the operator on duty is able to control individual, part or global street lamps, let them be timing on or off, adjust their brightness, and require the working status of the system via mobile. The experiment result shows that the operator can remote monitor the street lamps, let them work in intelligent mode or control mode. This system has the function of detecting the failure lamp automatically which ensure the failure lamp to be repaired in time, the power supply of the lamps can be switching in city electric mode and solar battery mode automatically to save electric power. This system is characterized by its humanity, intelligence, stable performance, low cost and low energy consumption, it is worth being used widely.