Abstract: In order to meet the needs of family gardening and planting，a micro plant factory for offices and houses was developed.Bringing in all technologies of largescale plant factory，the micro plant factory contained temperature and humidity control system，artificial lighting system and nutrient solution circle system，with which people could plant leaf vegetables in house.S7-200PLC，TPC7062K were used in micro plant factory automation system，and PID mode was also used in temperature and humidity precisely control.With the advantage of perfect function，handsome structure and convenience，people in cities could cultivate short-period，high-quality，non-pollution vegetables making use of micro plant factory.