In this paper, a smart LED lawn lamp control system is proposed. The system consisting of LED lawn lamps, PWM control circuits and ZigBee module is used to control the light dimming and energy management. Thus, the goals of environmental protection and energy-saving features can be achieved. In addition, the automatic warning mechanism in the street light is included in the system for the sake of traffic safety. The control center will receive the message immediately only if some sudden events. At this moment, the system will notice the maintenance man or related organization. However, the system has several advantages such as real-time monitoring, energy saving, easy maintenance and management, etc.