During the era of moderately prosperous tourism time，people are pursuing a higher level of demand for a better life，the upgrades of consumption are the driving force to advance this industry. Gradually，with the culture-tourism integration，leisure-tourism integration and tourism-life integration，host-guest sharing is becoming a vital trend in the developing urban leisure tourism period. Host-guest sharing mode breaks the limitations of the traditional tourism. Residents and tourists share the same lifestyle of the destination. Firstly，the host-guest sharing model is building. Based on this model，the crucial requirements for the innovation of urban tourism are concluded and the solutions are put forward. Taking the Guangdong-Hong Kong-Macao Greater Bay Area as an example，the current development characteristics of urban leisure tourism in the Greater Bay Area are summarized. Furthermore，the main creative Approaches to co-build the Humanities Bay Area and the Leisure Bay Area employed by OCT，is the very practice case based on the host-guest sharing model.