In order to find structure of "Cognitive Map" and "Cognitive Space", relationship between the two and path choice, after a walking experiment in a museum exhibition space, subjects were asked to draw the sketch of plan and ceiling plan of the exhibition space. Based on the sketches, it is found that: (1) while people spend short time in the exhibition or just walk around exhibition one time, their structure of "Cognitive Map" are always based on the trace of body moving. On the other hand, while people stay long time or walk around exhibition more than one time, their structure of "Cognitive Map" are based on construction of building; (2) Including the cognition of ceiling, the style of structure of "Cognitive Space" can be classified into "outside wall", "space along outside", "outside volume", "convex space with same height", etc. (3) Some people have the same unit of structure of "Cognitive Space" and path choice, which are "convex space", "continuous wall", so it can be said that unit of "Cognitive Space" is related to path choice.
