The purpose of this study is to promote the status of environmental education and environmental awareness among employees in company levels. To achieve the study purpose we measured the infrastructure of companies (e.g., re-education programs and social contribution activities) and how these enhance environmental awareness to the employees. The survey was conducted by questioning 100 company employees. The questionnaire was composed of two parts : 1) environmental pollution and 2) nature conservation. The Chi-square test and one-way ANOVA was applied to compare groups. The results can be summarized as follows : First, the environmental education for employees in companies is insufficient; however, environmental education should be necessary and the employees provided with environmental education by their companies appeared to be highly satisfied (p<0.05) than groups without appropriate environmental education. Second, volunteer workers for participating environmental education programs and events are rare; however, employees who participated in volunteer efforts scored the highest in environmental awareness. Third, those that participated in environmental education programs and volunteer works were ranked the highest in environmental awareness (p<0.05) in 10 categories of questions. Based on the study, the environmental education and the volunteer work appeared to be effective tools in boosting environmental awareness among company workers. In conclusion, environment oriented volunteer work is an effective way to improve environmental awareness toward adults.