This study proposes to apply wireless monitor and photovoltaic (PV) system to plant factory. The major structures include solar energy system, ZigBee wireless sensor network, and plant factory. In this system, the photovoltaic panels produce energy and the charge controller is used to manage the energy consumption of the load. In order to monitor the plant factory, a ZigBee wireless sensor system is applied. It will monitor the environment situations of the plant factory and supply the information of temperature, humidity, and illumination via the computer network. The system will adjust the environment conditions to enhance the plant growth. According to the experimental results, the system proposed in this chapter can enhance the growth of the plants and reach the goal of saving energy also.