The present invention relates to a pet dog behavior analysis system, and more specifically, to a system for providing behavioral characteristic information for each pet dog by analyzing movement characteristics of a pet dog. The pet dog behavior analysis system comprises: a sensor module which includes a first sensor unit located in spine of the pet dog, lower than the cervical vertebral, and a second sensor unit located in a part where synsacrum and coccygeal vertebra of the pet dog are connected, so as to detect the movement of the pet dog and to transmit sensing data to a pre-designated terminal module; a behavior analysis module which analyzes and store behavior language characteristics of the pet dog by collecting the sensing data, measurement time information and image data obtained by photographing behavior of the pet dog; and a terminal module which generates the image data by photographing behavior of the pet dog, receives the sensing data from the sensor module, and receives the behavior language ch
