The purpose of this paper is to derive the means to improve the preventive system for chemical accidents under the “Chemicals Control Act”, which came into effect in 2015, and to develop the measures to aid the industries that experience difficulties arising from the implementation of the same Act. In relation to technological development, the methodology behind the pre-environmental risk assessment for chemical accidents was analyzed and the trial application was conducted to prevent and counter any potential chemical accidents. Thus, this paper examined the possibility of introducing and applying the methodology for the pre-environmental risk assessment for chemical accidents in Korea and presented the direction for its future implementation. From the perspective of the policy, the difficulties experienced by business establishments and the pertinent specialized agencies were further explored in connection with the implementation of the policy for chemical accidents pursuant to the “Chemicals Control Act” so as to provide the measures to improve and facilitate the aforementioned Act.