Based on the person-organization fit theory, this research aims to investigate how socially responsible HRM positively affects employees’ organizational citizenship behaviors toward the environment by increasing person-organization fit. This study also captures the moderating effect of the perceived role of ethics and social responsibility in influencing the indirect effect of SRHRM on OCBE via person-organization fit. Data were collected from 302 employees in a state-owned chain hotel in Shanghai, China. The results indicated that SRHRM indirectly influenced employee’s engagement in OCBE through person-organization fit. The positive relationship between SRHRM and person-organization fit and the indirect effect of SRHRM on OCBE via person-organization fit were more significant when employees hold high rather than low levels of RESR. Research implications and prospects were also explored in this study.