Against the backdrop of deeply integrated global culture and tourism and ever increasingly intensified competition among various city brands, the creation of tourism space has been involved from the display of a single landscape to the construction of multi-dimension cultural scenes and experiences gaining from them. In spite of serving as the capital of Gansu Province and an important node city on the economic belt of the Silk Road, Lanzhou has still encountered the severe homogeneous dilemma of vague cultural imagery and blurred space-based characteristics in its tourism development. This paper introduced and defined the conception of "color-based geographical gene", and took Dunhuang’s artistic characteristics as a carrier of core regional-culture gene to explore a path of tourism space reconstruction translating cultural images into space-scene creations. It proposed a possible transformation path and its implementation strategy of Lanzhou’s tourism space with the core driver of "color-based narrative" and the core objective of "scene creation", thereby providing theoretical support and reference for geographical culture resources to be innovatively translated into urban spatial capital in modern times.