The invention discloses an intelligent ventilation, dust removing and purifying system based on a cloud server. The intelligent ventilation, dust removing and purifying system comprises the cloud server, an environment parameter collecting module, a communication module and a ventilation and dust removing module. According to the intelligent ventilation, dust removing and purifying system disclosed by the invention, control systems are mutually adjusted and mutually influenced, and through a background of the cloud server, the functions of reading, inquiring, storing, calculating and typing of historical data can be realized; after the operation of the system is stable, data is continuously uploaded to the cloud server and collected and organized by the cloud server, working laws of a workshop can be summarized, a working mode and corresponding working parameters are automatically adjusted, and a movement of which the measured value achieves a set value is converted to a pre-movement, so that indoor parameters are kept in a dynamic level, the indoor environment is kept optimized, besides, the amount of the operated equipment is guaranteed to be smallest, and the best energy-saving effect is achieved.