A positioning method, system and device, a storage medium, and a program product are disclosed. The positioning method may include: acquiring parameter information of at least two Reconfigurable Intelligent Surfaces (RISs) and parameter information of a base station; acquiring first time information and second time information, the first time information is information representing a time difference between a time point at which the base station sends a first positioning signal and a time point at which the base station receives a second positioning signal, and the second time information is information representing a time difference between a time point at which a terminal device sends the second positioning signal and a time point at which the terminal device receives the first positioning signal; and obtaining location information of the terminal device.