The invention relates to a marketplace indoor positioning navigation method and
system based on two-dimensional bar codes. The navigation method comprises the steps that (1), two-dimensional bar code labels are established in shops of a marketplace, thereby forming a two-dimensional bar code
system, and marketplace shopping guide machines are established in the marketplace; (2), mobile terminals enter marketplace center shopping guide service platform by scanning the two-dimensional bar code labels or the two-dimensional bar code labels on the touch screens of the marketplace shopping guide machines through utilization of a
wireless communication network and establish connection relationships with the marketplace center shopping guide service platform, and a marketplace internal
wireless communication network is responsible for data
interconnection between the mobile terminals and the marketplace center shopping guide service platform; and (3), the marketplace center shopping guide service platform collets information of the two-dimensional bar code labels sent by the mobile terminals, then compares the information with a marketplace two-dimensional bar code address
library, judges positions of the mobile terminals, provides positioning service for the mobile terminals and displays a marketplace map. The
navigation system comprises the marketplace shopping guide machines, the two-dimensional bar code
system, the mobile terminal and the marketplace center shopping guide service platform.