The work aims to design serious games and innovative experience for the temple fair from the perspective of metaverse under the background of digital cultural tourism with Foshan Ancestral Temple as the object and then put forward a new experience mode - cloud temple fair and deeply excavate and analyze the problems and pain points existing in the current temple fair tourism. Based on the design principle of serious games, the PACT-P system mode of cloud temple fair was built. H5 Mugeda interactive software was applied to edit the game content, and systematically transform and upgrade the games from the aspects of temple fair scenic spots, customs and rituals, temple fair activities and market trade, so as to realize the convenience, playability and interaction of serious games at cloud temple fair. On the one hand, the cloud temple fair aims to solve the problems of lagging development, insufficient communication and low participation of tourists in traditional temple fair tourism. On the other hand, making the cloud temple fair tourism give consideration to both playfulness and education through serious game forms, not only broadens the diversified development path of traditional temple fair tourism, but also provides practical reference for the development of digital cultural tourism.