This paper analyzes qualitatively and interprets the adaptation mechanism and its encoding and decoding principles of the propagation behavior based on the cross-domain propagation mode of the ternary subjects of “HumanMachineThing” in the environment of Internet of things, then researches empirically on the multi-agent propagation behavior of Internet of things by applying TFNMD and using for reference an application example of network system. The quantitative evaluation and performance test of propagation architecture of Internet of things are implemented according to the results of fuzzy comprehensive evaluation. Finally, this paper confirms the propagation system of Internet of things is superior to the existing propagation system in the propagation performance through the sorting weight of the propagation effectiveness index of the empirical system, and the experimental results match the expected.