Nowadays, such problems as monotonous tourism products and focusing mainly on physical sightseeing exist in traditional cultural scenic spots, which lead to insufficient demonstration and experience of the cultural background and connotation of cultural tourist spots. Thanks to the development of Mixed Reality (thereafter MR), digital, interactive and entertaining tour experience becomes possible in traditional cultural scenic spots. MR is a technique to overlay and integrate virtual scenes with actual scenes. It can play a significant role in digitized development, interactive entertainment experience and demonstration of scenic resources. Therefore, a solution on ISP-based MR Digital Cultural Tourism Interactive System is proposed in this paper, based on which two digital cultural tourism interactive experience cases are designed and achieved.