The invention relates to the technical field of power construction, and particularly discloses a capital power transmission project progress monitoring method and system, and the method comprises thesteps: obtaining the onsite image data of each node; establishing an engineering image model corresponding to the capital construction power transmission engineering, wherein the engineering image model comprises a plurality of to-be-filled areas in one-to-one correspondence with the nodes; and filling corresponding construction progress information in the to-be-filled area corresponding to the node according to the field image data of each node. The invention provides a capital construction power transmission project progress monitoring method and monitoring system, which can realize automatic monitoring of the construction progress of each node of a capital construction power transmission project, and have the advantages of high efficiency, high accuracy, high updating speed and the like.