The amount of information in project cost management is huge, and the type is complex, it is difficult to guarantee the management quality and efficiency under the pure manual mode. Therefore, it is recommended to carry out the information construction work of engineering cost management, aiming at improving and guaranteeing management quality and efficiency through information technology. This paper will analyze the significance of informatization construction of engineering cost management, and then propose informatization construction strategies and precautions. Through the strategy, information technology can give full play to the role of information technology in cost management work, and promote the development of engineering cost management level.