Abstract:This article focuses and analyzes the Nanjing Agricultural University’s exploring and practicing of the agricultural extension pattern such as “Experts in fields”, “Caravans of science and technology”, “Double hundred program”, “Experts workstation”, and it elaborates the multi-mode and mechanism of agriculture extension service, which is a result of this university’s innovation. The article then comes up with the idea that under the new development requirements of ‘Four modernizations synchronization’ such as agricultural modernization, colleges and universities should place the agriculture extension institution in the leading position, combining it with diversified agricultural subject, and finally create an integrated service mode of university technology and scientific extension which is carried out by agricultural university, R D institution and extension agency together and based on the technology and workers’ quality development.