information has become one of the main tasks of government departments.In order to strengthen the work in this area, meet the needs of the national plant protection system for the growing information, the information office combined with the Provincial Plant Protection Station, assimilated part county level plant protection stations (companies),established national information network in 1985. In the same year,the council of national information network held The First National Plant Protection Pnformation Exchange & Sprayers Trading (Ordering) Fair,invited national plant protection system and pesticide, machinery production enterprises to participate,as for great impact and good results, aroused agriculture ,chemical industry and other leading departments’ great attention. Since then,gradually formed the system, gradually standardized, held it once a year, the impact and scale is getting bigger and bigger, and has great economic and social benefits.