This study is placed as fundamental research of the intelligible architectural-urban design. And in this paper, we discussed the space cognition when take the relation of human’s body and multiple visual objects as our study object. We considered the possibility that the visual changing phenomenon generated from body moving might be used as criteria for distance cognition. The experiment was carried out in a simulation environment which was a simplified modeling of the visual phenomenon in the real environment. In the experiment, the observer had to tell the relations between the object and standard stimulus in numbers and what their conclusion was based on. The experimental result proved the possibilities that people might cognize a distance by observing the visual changing phenomenon generated by body moving. However, it is also noticed that the cognitive result was affected significantly by the observers’ criteria used in distance cognition process. There are five kinds of cognition criteria when classifying by their characteristics. “Relative sinking amount” criteria: The observers tend to simply use the image of sinking amount as the resort of judging the distance. “Relative sinking speed” criteria: The observers estimated a distance by observing the relative speed change generated by the motion of the observation-point. “Stepping analysis” criteria: The observers always divided the whole process into several steps and chose the proper visual elements for every step to cognize a distance. “Multi-observation” criteria: The observers used several observing elements for one distance cognition. “Direct perception” criteria: The observers used few concrete visual elements like “sinking amount”. Instead, they always observed “moving things”, “appearance of approaching” etc for distance cognition. In generally, there is a tendency of underestimation when the given distance is in the middle or long-distance. However, the observers, who used the “direct perception” criteria, often overestimate the distance. The deviations of the cognition distance to the given distance are different due to the cognition criteria. The maximum deviation is occurred when apply the “relative sinking amount”; in contrast, the minimum one is generated when utilize the “direct perception” criteria. In other word, we obtained more accurate cognitive distance when the observers observe the overall visual changes and cognize the distance from the status of visual objects in motion.