The invention provides an indoor plant factory system. The system comprises a planting room, a nutrient solution room and a control system, wherein the planting room comprises a seeding room, a seedling room, a cultivation room, a harvesting room, a cleaning room, and is a planting place of plants; the nutrient solution chamber is provided with a mother liquid tank, a nutrient liquid tank and an assorted water supply and drainage system, and is a preparation and control place for a nutrient solution; the control system comprises an HVAC control system, a nutrient solution control system and anLED growth lamp illumination system, and is used for monitoring, adjusting and controlling environmental parameters in a plant factory and a nutrient solution system. The indoor plant factory systemhas the advantages that the degree of automation is high; an assorted loading and unloading device and cultivation groove transport equipment are arranged, so that the manpower is reduced; the nutrient solution, the environmental temperature and humidity, the LED fill-in light, the CO2 gas fertilizer and the like are highly automatically controlled, so that the manpower is reduced, errors caused by human operation are avoided, the space utilization is high, the planting row spacing can be adjusted along with the growth of vegetables, and compared with a conventional planting method, planting amount can be increased by 50% per unit area.