In recent years, intelligent construction concepts and intelligent manufacturing technologies have been introduced into the construction area, and promote assembly buildings to higher levels. On-site construction and factory prefabrication as the main link in the prefabricated construction process, have a direct impact on the progress, cost, and safety quality of construction projects. Therefore, it is necessary to analyze the construction intelligence of assembled buildings. This paper introduces an overview of the intelligent manufacturing of assembled buildings, discusses in detail the problems and innovation demands of intelligent manufacturing based on EPC engineering, combs the problems faced by prefabricated intelligent construction, and puts forward targeted countermeasures and innovative ideas.