The purpose of this paper is to develop a kind of efficient, convenient and reliable intelligent greenhouse heater. The disadvantages of present heaters used in greenhouses are analyzed. The new method of applying fuzzy control principle to greenhouse heaters is proposed, and the greenhouse heater base on fuzzy control is successfully developed. The test results show that the performance of the heater is stable and liable, its adaptability and effect of power saving are good. It is valuable to popularize this kind of heater.