The invention relates to a system and a method for automatically generating reports during power monitoring and supervision, and is applicable to management of supervision departments for power quality of an electrical power system. A hardware part comprises the structure that a local computer is connected with a local area network through a switch; the local area network is connected with a protocol converter through a data acquisition unit; the protocol converter is connected with a server through a communication interface; and the server is connected with a network printer. A new reporting file is generated through extracting and comprehensively analyzing received formative reports in word and Excel forms by means of high efficiency of the computer, and is outputted through the printer. The requirement of short reporting time and the high requirement of analysis content accuracy can be met, and the supervision department can know the current work condition in time. On the premise of ensuring the analysis accuracy, the analysis and conclusion work of a power monitoring task is quickly finished, and the power quality is beneficial to improvement.