Abstract: Construction log is widely used in checking and completing completion data, it is difficult to accurately record the actual construction process. The phenomenon of lacking the information of the log due to the person’s mobility is often happened. The previous manual reporting exists some shortcomings. The Electronic Construction Log System solved the problems that log format is not uniform and the level of detail is uneven. To ensure the construction log timely, accurate and standardized, to implement the information traceability of construction site technical, safety and quality, the Electronic Construction Log System was developed. This article introduced the System of framework, function and applications.