The development of greenhouse is limited by its high energy consumption, application of renewable energy in greenhouse is an effective way for energy saving. In this paper, an approach of photovoltaic (PV) power generation and control technology is applied to greenhouse. The PV panels were installed directly on the top of the greenhouse. The PV system generates power for the greenhouse by parallel with the mains and a small amount of batteries were applied to ensure the reliability and smoothness of power supply. Besides, based on the wireless communication technology, a remote monitoring system was developed to acquire the greenhouse environmental factors and demonstrate relative data. The proposed system not only adjusts the environment parameters of greenhouse automatically according to the reference value, but also monitors the energy flow of the entire system. Results show that the system satisfies the needs of power for greenhouse in winter, as well as the partial in summer, thus greatly reducing the need for fossil fuels and achieves the goal of energy saving.