The invention relates to a purification, disinfection, humidification, dehumidification and temperature adjustment device which comprises a master purification, disinfection, humidification, dehumidification and temperature adjustment all-in-one machine and a plurality of slave purification, disinfection, humidification, dehumidification and temperature adjustment all-in-one machines. The master purification, disinfection, humidification, dehumidification and temperature adjustment all-in-one machine is of the same structure as the slave purification, disinfection, humidification, dehumidification and temperature adjustment all-in-one machines. An intelligent master control module is arranged in each machine frame and comprises a serial communication interface I, a serial communication interface II and a serial communication interface III. The slave purification, disinfection, humidification, dehumidification and temperature adjustment all-in-one machines are connected to the serial communication interface II of the master purification, disinfection, humidification, dehumidification and temperature adjustment all-in-one machine through the corresponding serial communication interfaces III.