A store system comprising: a fitting room, the fitting room comprising a first door and a second door, the first door configured for a user to enter and exit the fitting room, and the second door configured for delivering one or more candidate clothing items for try-on; and a first device, deployed in a back warehouse area of the store, configured to: obtain a relationship between the user and information of one or more clothing items; and provide, based on the relationship, item preparation prompt information for preparing the one or more candidate clothing items for the user for delivery to the user via the second door of the fitting room; characterised in that the store system comprises a second device, deployed in the fitting room and configured to: determine identification information of the user entering the fitting room; request, from a server, the information of the one or more clothing items corresponding to the user, based on the identification information; output the information of the one or more clothing items to a first display screen in the fitting room for display, wherein the first display screen comprises a mirror screen configured to present a try-on effect of a clothing item dressed on the user; determine a clothing item currently being tried on; provide, from historically purchased clothing items of the user, recommendation information of items that match the clothing item; determine a matching clothing item selected from the recommendation information; obtain information of displaying content material for the matching clothing item; and display the displaying content material based on an imaging position of the user at the mirror screen and a type of the matching clothing item to provide a virtual try-on effect of the matching clothing item dressed on the user. a fitting room, the fitting room comprising a first door and a second door, the first door configured for a user to enter and exit the fitting room, and the second door configured for delivering one or more candidate clothing items for try-on; and a first device, deployed in a back warehouse area of the store, configured to: obtain a relationship between the user and information of one or more clothing items; and provide, based on the relationship, item preparation prompt information for preparing the one or more candidate clothing items for the user for delivery to the user via the second door of the fitting room; obtain a relationship between the user and information of one or more clothing items; and provide, based on the relationship, item preparation prompt information for preparing the one or more candidate clothing items for the user for delivery to the user via the second door of the fitting room; characterised in that the store system comprises a second device, deployed in the fitting room and configured to: determine identification information of the user entering the fitting room; request, from a server, the information of the one or more clothing items corresponding to the user, based on the identification information; output the information of the one or more clothing items to a first display screen in the fitting room for display, wherein the first display screen comprises a mirror screen configured to present a try-on effect of a clothing item dressed on the user; determine a clothing item currently being tried on; provide, from historically purchased clothing items of the user, recommendation information of items that match the clothing item; determine a matching clothing item selected from the recommendation information; obtain information of displaying content material for the matching clothing item; and display the displaying content material based on an imaging position of the user at the mirror screen and a type of the matching clothing item to provide a virtual try-on effect of the matching clothing item dressed on the user. determine identification information of the user entering the fitting room; request, from a server, the information of the one or more clothing items corresponding to the user, based on the identification information; output the information of the one or more clothing items to a first display screen in the fitting room for display, wherein the first display screen comprises a mirror screen configured to present a try-on effect of a clothing item dressed on the user; determine a clothing item currently being tried on; provide, from historically purchased clothing items of the user, recommendation information of items that match the clothing item; determine a matching clothing item selected from the recommendation information; obtain information of displaying content material for the matching clothing item; and display the displaying content material based on an imaging position of the user at the mirror screen and a type of the matching clothing item to provide a virtual try-on effect of the matching clothing item dressed on the user.