Therefore,visual anthropology is required to get rid of the outdated cultural outlooks and traditional dichotomy,and to get on its own way in exploring theoretical potential for developing visual anthropology and in analyzing the more and more media-oriented world at various levels.

Since the start of the policy of reform and opening to the outside world,Chinese visual anthropology developed quickly in resent thirty years.

How to develop and sublimate the excellent cultures of all ethnic groups while carrying them on and building up new ethnic cultures ? The article makes a probe into the harmonious connection and interaction between visual anthropology and Yao studies,in the hope of throwing light upon the further study between "tradition" and "modernization".

Within the subject of anthropology,video anthropology,one branch of visual anthropology,has undergone the process of three steps,from as an organon,a methodology to a thought-way.

The paper makes a review of the development of video anthropology in Europe and America and makes a brief introduction to the achievements made by pioneers in the anthropological branch.

On the basis of synthetically analyzing life cycle impact assessment methods in the world,combined environmental characters of life cycle processes for the iron and steel production,a life cycle impact assessment method about the iron and steel products is presented,including selection of impact category,selection of characterization model and explanation of characterization result.