The invention belongs to the field of buildings, and in particular discloses a method for mounting an insulating and decorating integrative board. The method for finishing the mounting of the insulating and decorating integrative board mainly comprises the following steps: treating a basic wall body, setting out and typesetting, preparing special adhesive, coating and caking mortar, arranging boards, adhering and mounting, anchoring, mounting an automatic deflation valve, treating board seams, cleaning board surfaces, self-checking and protecting a finished product. The method is quick and scientific, saves time and labor, has high safety performance, reduces the manufacturing cost of construction, is favorable for improving the efficiency, and achieves the aim of energy conservation.