Abstract: Domestic and foreign scholars so far have conducted extensive research and explore on the agricultural technology extension, stressing on the promotion，extension model, extension methods, problems of extension and performance evaluation of agricultural extension. There are some problems in study that less literature analyzes technology message that farmers want most, the situation of adoptions of new variety, new technology, new fertilizer that agricultural workers promote and so on. The study on performance evaluation of agricultural extension is mainly based on the government, agricultural organizations, while lacks in evaluation from the farmers. Moreover, the current studies mainly reflect agricultural extension situation in a period of a region, lack of vertical comparison in different periods and horizontal comparison in different areas. And, the research on overall performance evaluation of agricultural extension and the change of household income and family circumstances after adopting the new technologies is relatively lacking. This article summarizes the general situation of research no the agricultural technology extension, points out the existing disadvantages and discussed the future directions of research on the agricultural technology extension.