This paper, starting at the viewpoint of unified cognition, language and action, attempts to reduce the Mo Tzu Hsiao Chu into the system of Mo Pien and elucidates the Ming Pien thought that is relevant to the methodology and philosophical logic in Hsiao Chu. This paper is divided into three parts: I.Preface: to derive the viewpoint from the general studies on Mo Ching and Hsiao Chu. 2.Content:from the viewpoint of action philosophy to discuss the Mo Pien thought in Hsiao Chu. Firstly to point out the philosophical background of discussing Hsiao Chu; secondly to interpret unified cognition, language and action in Hsiao Chu: (l) Lie Tzu: point out the need and purpose of setting up a propositIOn to the topic.(2) Primary principle of setting up a proposition.(3) The elements of proposition and the process of setting proposition. (4) The basic type and practice of Hsing Tzu, the distinguish and explanation about Huo, Chia, Hsiao,Pi, Mou, Yuan and Tui. (5) five set examples of Hsing Tzu: the analysis on differentiation. 3.Conclusion: to review and criticize the Mo Pien in Hsiao Chu as well as to elucidate the contribution of Hsiao Chu to Chinese Ming Pien thought.