The agriculture—oriented greenhouses are usually affected by location, temperature, season, etc., and it is difficult to monitor and control the crops growing in them. In this paper, a system scheme based on multi—sensor detection and data fusion technology is proposed for green house monitoring and contr01. The arithmetic improves the objectivity of data fusionby the orders of sensor fusion according to the minimum distance clustering. By using thismethod, the accuracy of environment measurement is improved, and the temperature, humidity and illumination in greenhouse are well regulated SO as to provide ideal conditions for greenhouse crops.