supervision engineer. According to the query of construction engineering education network, the supervisor log recorder is filled in and signed by the supervisor engineer who is responsible for recording. The supervision log is the original record of the supervision engineer's supervision activities, and it is also the important information for executing the supervision entrustment contract, compiling the supervision completion documents and handling claims, extensions and changes. It is the most important, original and reliable material for analyzing engineering quality problems. It is also the most basic part of the project supervision file, so the supervision engineer who is responsible for recording will fill in the signature, and then the project chief supervision engineer will review it regularly.