A photovoltaic string location update method for a photovoltaic power station comprising at least one inverter connected to a plurality of photovoltaic strings, comprising: obtaining, based on a physical map having row and columns and indicating the plurality of photovoltaic strings arranged in the column direction each including a plurality of photovoltaic modules connected in series in the row direction, a physical location of a first photovoltaic string corresponding to a first logical location in the physical map, wherein the logical location of the first photovoltaic string is an identifier corresponding to the first photovoltaic string and wherein the physical location is a row/column where the first photovoltaic string is located in the physical map, wherein the physical map is used to indicate a correspondence between a logical location of a photovoltaic string and a physical location of the photovoltaic string in the physical map, and the photovoltaic string comprises the first photovoltaic string; and when the physical location of the first photovoltaic string in the physical map is different from a first actual physical location of the first photovoltaic string, updating the physical location of the photovoltaic string in the physical map to the first actual physical location, to obtain an updated physical map; receiving a first infrared image from an image collection terminal, wherein the first infrared image comprises a plurality of photovoltaic strings, the first photovoltaic string is one of the plurality of photovoltaic strings, and an image feature corresponding to the first photovoltaic string in the first infrared image is different from an image feature corresponding to another photovoltaic string; and obtaining, based on the first infrared image, a physical location of a photovoltaic string whose image feature is different from the image feature corresponding to the another photovoltaic string, to obtain the first actual physical location. obtaining, based on a physical map having row and columns and indicating the plurality of photovoltaic strings arranged in the column direction each including a plurality of photovoltaic modules connected in series in the row direction, a physical location of a first photovoltaic string corresponding to a first logical location in the physical map, wherein the logical location of the first photovoltaic string is an identifier corresponding to the first photovoltaic string and wherein the physical location is a row/column where the first photovoltaic string is located in the physical map, wherein the physical map is used to indicate a correspondence between a logical location of a photovoltaic string and a physical location of the photovoltaic string in the physical map, and the photovoltaic string comprises the first photovoltaic string; and when the physical location of the first photovoltaic string in the physical map is different from a first actual physical location of the first photovoltaic string, updating the physical location of the photovoltaic string in the physical map to the first actual physical location, to obtain an updated physical map; receiving a first infrared image from an image collection terminal, wherein the first infrared image comprises a plurality of photovoltaic strings, the first photovoltaic string is one of the plurality of photovoltaic strings, and an image feature corresponding to the first photovoltaic string in the first infrared image is different from an image feature corresponding to another photovoltaic string; and obtaining, based on the first infrared image, a physical location of a photovoltaic string whose image feature is different from the image feature corresponding to the another photovoltaic string, to obtain the first actual physical location.