This study first proposes a conceptual structure from Ajzen's planned behavior theory; next conducts paper review, then does practice study of waste disposal treatment; finally uses three dimensional factors and six sub-dimensional factors to examine their relationship and interaction with tendency attitude of environmental behavior. The three dimensional factors are tendency attitude, subjective norms and behavioral control perception of environmental behavior, and six sub-dimensional factors are moral perception development, environmental ethic concept, internal and exterior stakeholders' influences, self-efficacy, and instrumental ethical climate. This study conducts the empirical research by questionnaire survey and statistic analysis. The results are as follows: 1. There is significant correlation between moral perception development and business managers' decision intention on environmental ethics. 2. There is no significant correlation between environmental ethic concept and business managers' decision intention on environmental ethics. 3. There is significant correlation between internal stakeholders' influences and business managers' decision intention on environmental ethics. 4. There is significant correlation between exterior stakeholders' influences and business managers' decision intention on environmental ethics. 5. There is significant correlation between self-efficacy and business managers' decision intention on environmental ethics. 6. There is significant correlation between instrumental ethical climate and business managers' decision intention on environmental ethics. 7. There is no significant difference on demographic variables for business managers' decision intention on environmental ethics. 8. There is significant difference on some demographic variables for each dimension that influences business managers' decision intention on environmental ethics. 9. There is significant difference on some dimensions that influence business managers' decision intention on environmental ethics for different business manager groups of environmental ethic decision intention.