The invention provides a data processing method and system. The method comprises the following steps that: a mobile terminal acquires image information and coordinate information of a road construction site; the mobile terminal matches the coordinate information with data of characteristic pile numbers and construction coordinate range pre-saved in a database; the coordinate information is converted into pre-saved location information characterizing the pile number and construction and corresponding to the data if matching is succeeded; and the mobile terminal acquires supplementary information input by users, combining the supplementary information, the location information and the image information into construction information, and transmitting the construction information to a server,so that the server can back up and save the construction information. By adopting the system, daily work of the project department can be simplified, and daily construction management and constructionarrangement can be facilitated.