The invention provides a production method of inorganic nanometer light response type self-cleaning polyester fiber, comprising the following steps of: firstly specially producing visible light response type photochemical catalyst and easily-dispersed functional self-cleaning master batch, mixing the specially-produced functional master batch with polyester chip, and producing the inorganic nanometer light response type self-cleaning polyester fiber by a polyester fiber production technology. On the premise that the physical and chemical properties and the spinnability of the conventional fiber are not changed, the inorganic nanometer light response type self-cleaning polyester fiber has the characteristics such as bacteriostasis, air cleaning, self-cleaning function of easily desorbing greasy dirt, wide reaction condition, economical efficiency and the comprehensive treatment on pollutants. The various textiles made from the fiber, such as curtains, tablecloth, sofas, bedclothes and clothes, just like automatically running air cleaners, can be widely used in places such as bedrooms, hotel rooms, hospital wards, office, shopping malls, restaurants, indoor recreation grounds, etc.