The invention discloses a transmission line malfunction visualized report method and system based on a Web and a GIS. The system comprises a web server side (1), a switch (2) and a client side (3). The web server side (1) is used for acquiring transmission line malfunction information, locating a malfunction to a specific tower, and providing Web services by combining a satellite map. The switch (2) is used for enabling the web server side (1) and the client side (3) to be connected. The client side (3) is used for visualized displaying of the transmission line malfunction. After electric transmission lines of a power grid break down, the system is triggered to work, the Web service side locates the malfunction tower position and generates an XML file after malfunction information computational analysis, and provides Web services to the client side (3) to carry out visualized displaying of the malfunction information. According to the transmission line malfunction visualized report method and system based on the Web and the GIS, the transmission line malfunction information is displayed visually in real time, the visual cognition degree of power transmission network malfunctions is improved, the capacities that power enterprise personnel display important information in a large amount of power system data and monitor the states of the power grid can be improved, and the reliability of the system is guaranteed.