Exploration of mineral resources had been part of the major means to promote economic development in Morocco, but the devastating effect of mining on the environment is inevitable. Based on the factors analysis of the environmental disasters caused by the mining activities, the Jbel Tirremi mine, located in the North-Eastern part of Morocco, North Africa is one of the Open Pit which resulting in an impact on the environmental system. This paper systematically analyzes the influences of Open Pit mining on the land resource, air quality, sound, water resources, ground, species, Socio-economic, ecological system, geological and ecological environment, especially analyzes the effects on the environmental system.