The invention relates to the field of automation, and discloses a garment fitting simulation method and device, so as to solve the technical problem that a fitting effect of a network garment cannot be provided in the prior art. The method includes: collecting to obtain a body measuring image of a first user, and determining body characteristics of the first user based on the body measuring image, the body characteristics representing size information of the first user; establishing a human body point cloud model of the first user at least based on the body characteristics; determining a garment point cloud model of a garment; calculating an elastic force value that the garment point cloud model is subjected to when the garment point cloud model fits the human body point cloud model; and simulating a display form of the garment point cloud model fitting the human body point cloud model at least based on the elastic force value. The garment fitting simulation method provided by the invention achieves the technical effect of being capable of providing a fitting effect of a network garment.