The human cognition from low to high is divided into data, information, knowledge and wisdom of these four levels in knowledge management systems. These four levels cover the interaction between man and the outside world of human cognition. The World Development Report published in 1988 took Knowledge and Development as its theme, it says that data is organized numbers, words, sounds, and images. Information is data which processed and arranged in a meaningful form. Knowledge is valuable information for the production. Wisdom is the comprehensive ability to use data, information and knowledge. As a cognitive activity, the content of science communication is nothing less than performance into data, information, knowledge and wisdom. This paper selects a number of children popular science booksat home and abroad, and takes a comparative analysis on these books. The purpose is to summarize the similarities and differences, thus propose constructive comments and ideas to increase the quality of our children popular science works.