The current search task is gradually turning from traditional information retrieval to exploratory search. In view of the space and interactive constraints on the vertical list of search boxes for prompt keywords, this paper designs and implements a visualization method of the spherical tag cloud for prompt keywords list. Firstly, the method of generating the keywords is analyzed, and a simple organization storage mode is designed. Secondly, for the heat keywords data stored in one dimensional array of, a layout method is designed, which is diverging along the sphere from the North Pole. And, for the classification data stored in one dimensional vector, a fixed hemispherical pattern is designed, which is divided along the longitude. Lastly, the driving, restructuring and other convenient ways of interaction are designed. Test results show that the designed methods could better utilize the space, show more keywords, and find the needed keyword faster.