Ethics and law are two kinds of leading methods for environment protection. With regard to ecological environment protection, both morale ethics construction and laws construction are the same important, the latter is at institutional level and is coercive while the former is intrinsic and is basic. If only legal external enforcement can not make the people psychologically agreement, but only the psychologically common agreement of the people and only the homogeneity and integration of the two kinds of intrinsic and external factors can attain the goal of environment protection. Thus, ecological construction should stick to the combination of legal and morale management.