The present invention discloses a method and system of decoration project construction management based on the technology of internet of things. The decoration and fitment product data is standardized, the connection with a DPM management system is established, the site collection and the real-time monitoring are realized based on the technology of internet of things, the real-time monitoring comprises construction material storage/retrieval and usage condition monitoring, construction schedule track, construction quality monitoring and analysis, and site worker construction task completion condition monitoring and analysis, and the project dynamic construction cost track is realized. The technology of the internet of things, the two-dimensional barcode technology and the RFID technology are employed, a laser scanner and a wireless sensor are used, the information of people, materials and machines on the construction site is collected to a route device through the ZigBee protocol and is transmitted to a central information system through adoption of the internet to realize the real-time transmission and sharing of the information such as the decoration project cost, the schedule, the quality and the safety and solve the problem of the timeliness and the accuracy of the information collection of the DPM system.