Methods used in common in mathematical model and landscape ecology can reflect well the present status of regional ecological pressure and compare breadthwise between regions. Being short of lengthways comparison, it cannot reflect well the characteristics of regional ecological pressure and safety. Considering landscape ecological original value in certain period and human activity, this paper established landscape ecological background value. Using landscape ecological background value for reference, this study assessed regional ecological pressure and safety by degree of departure. The results not only can show clearly the characteristics of regional ecological pressure and security, but also can disclose the degree and characteristics of regional ecological pressure and safety imposed by human factors.