Abstract: A door security system that includes an interior component system, an exterior component system, a hinge screw component, and a door striker component. The interior system consists of a pair of plates, one mounted on the door and the other mounted on the door jamb. Each plate includes a flanged portion having a pair of apertures. A bolt consisting of a rod and a hook is inserted through one aperture of each plate to secure the door to the door assembly. A chain and hook system is connected between the other two apertures of the respective plates. When only the chain is used, the door can be safely opened partially to preview the prospective visitor. The exterior component consists of a flanged plates wherein a flanged portion is designed to fit into a corresponding slot in the door jamb to inhibit forceful entry into the dwelling. The hinge screw components includes a screw having a threaded portion and a protrusion member.