Scarcity of resources has been creating a worldwide ecological problem affecting all human beings. With respect to this, concerns on the effective use of resources and the production of environmentally-friendly products have been arising and resulted into the development and growth of green consumers segment around the world in the recent decades. Finding the appropriate way and approach to target this segment of consumers becomes vital in many companies; in order to do so, understanding the underlying factors affecting the consumers’ performance of socially responsible behaviour becomes the key. Considering the growth of such segment of consumers is only at a preliminary stage in Macao, studies on how these consumers act and behave are still under exploration. Thus, this study mainly aims to analyze the underlying factors that affect the consumers’ socially responsible behaviour from different approaches. It will focus on exploring the causal relationship of environmental values and environmental related knowledge on the performance of socially responsible behaviour; meanwhile, the mediation effect of environmental attitude on these aforementioned relationships will also be tested in this present study. Data were collected from 116 individuals and results were analyzed by adopting the linear regression approach in SPSS. Results revealed that environmental values and environmental related knowledge are positively related to the performance of socially responsible behaviour. Meanwhile, the results also reflected that environmental attitude in fact takes up a mediating role on the relationship between environmental values and the performance of socially responsible behaviour; while on the other hand, no evidence shows that environmental attitude mediates the relationship between environmental related knowledge and socially responsible behaviour. These results, not only highlighted the underlying factors affecting an individuals’ performance of such behaviour, it also assists to provide companies more clues on how to exert the appropriate marketing effort to meet with the demands of the green consumers segment, and most of all, the analytical results are expected to provide more insights for further in-depth study to promote and arouse the society’s attention on socially responsible behaviour and green consumer behaviour in Macao.