Abstract: Provided is a behavior measurement and maintenance method using a multi-axis sensor, including the steps of: providing one or more moving pipes such that the moving pipes are penetratively connected while both ends thereof are positioned on the ground along a surface to be measured of a tunnel, a slope, a sewer pipe, a structure and the like; providing one or more multi-axis sensors such that the sensors are connected to a logger exposed to the outside of the moving pipe and move along the inside of the moving pipe; and exposing the multi-axis sensor to the outside of the moving pipe or inserting the same into each moving pipe so as to move the multi-axis sensor to each measuring point along the moving pipe, thereby inserting the multi-axis sensors into the moving pipes so as to simultaneously or successively measure the displacement of each measuring point or discharging the multi-axis sensor from the moving pipe after measurement is completed.