Magic World MMORPG is an overhead magic fantasy world in which players play as warriors, mages or archers and start their own fantasy adventure. This project realizes part of the core gameplay of the current mainstream massively multiplayer online adventure game (Massive Multiplayer Online Role-Playing Game). As of the time of project submission, account registration, multi-person online, career selection, map transmission, NPC system, store system, backpack system, equipment system, task system, brush monster system, friend system, team system, guild system, chat system, mount system, sound system development, and these systems have good scalability. In the development of the server, the SQLServer database is used to store the player's data. In the sending and receiving of network messages, the current popular protocol buffer protocol generation tool and the Entityframework framework are used to operate the database, which greatly reduces the tedious writing of the bottom layer of network communication and complex database operations, and enables individual developers to make functional effects similar to those of commercial projects. The purpose of developing the fantasy world MMORPG game is to build a virtual social living environment to bring a new way of entertainment to the general public. It is not only a pastime, but also through the role-playing in the game, people can experience another kind of The different life of the character can be described as endless fun. For moderate gamers, a good online game can achieve the purpose of relieving stress and relaxing the body and mind, especially for the stressed working class and the Senior high school students with heavy academic work. It is still quite a good choice for them to play online games during the rest. And can exercise thinking, active mind, the appropriate game will be good for the brain. Broaden your horizons, be able to see a variety of people, cultivate communication and trading skills; develop intelligence, improve the coordination of human hands and brains, and improve responsiveness.