Abstract: This study focuses on the intelligent manufacturing, which is the developing trend and hotspot of manufacturing industry, and discusses the potential advantages and problems that may come along with the hardware and technology upgrading of IOT (Internet of Things)-based intelligent manufacturing. We further explore the importance of constructing a three-network-integrated intelligent manufacturing ecosystem through introducing Internet of Service and relationship network (guanxi network). This study also illustrates how to integrate three networks to achieve effective coordination and reduce cost, and proposes several corresponding management emphases. Our findings suggest that traditional IOT-based intelligent manufacturing not only brings development opportunities, but also causes specific problems. Through introducing Internet of Service and relationship network (guanxi network), the construction of three-network-integrated intelligent manufacturing ecosystem can better deal with the potential management problems and challenges.