Abstract: Modern agricultural S&T service industry is the core of promoting agricultural modernization. Tangshan is a big agricultural city. Meanwhile there are many problems in agricultural S&T service industry, like agricultural S&T service level is not high, agricultural scientific research is disjointed with agricultural production, service system for spreading agricultural S&T is imperfect, agricultural S&T achievements conversion is low, etc. The priority in Tangshan agricultural S&T service industry development is agricultural informationization service, agricultural science and technology, financial services, agricultural S&T innovation and agricultural technology extension services. Finally author puts forward the countermeasures for development of agricultural S&T service industry in Tangshan.