The invention discloses an installation method for a monitoring system, which comprises the following steps of: cable selection, i.e., selecting and laying a cable according to a length of each section of line in a design drawing, and adhering tags at both ends of the cables; camera installation, i.e., forming a closed-circuit television monitoring system by image pickup and transmission, control,image processing and display parts together; single camera debugging, i.e., powering on cameras one by one to carry out detection and debugging and by powering on, trying, fine adjusting and observing a coverage range and image quality of a video region; and control of indoor cable laying. The installation method for the monitoring system, which is disclosed by the invention, has the beneficial effects that by the monitoring method, infinite extension of a period, which is caused by repeated construction, can be avoided, a construction period and human resource cost are saved, and a difficultproblem caused by dependence on personnel for inspection and physical isolation is overcome; and when being applied to personnel monitoring at an entrance and an exit of a building and in a key prevention region, the installation method is intelligent and is also convenient, so that working period time is reduced.