The present invention relates to an access sensing and alarm system which is provided with an independent power source using a solar battery and a secondary battery operates an alarm while forming a virtual barrier wall when sensing the approach of a wild animal or a person approaching illegally in the range of a certain area such as an area around a road, a crop cultivation area, etc., thereby turning away the animal or person approaching and also visually displays a wild animal appearance area to a driver who drives around the road. Accordingly, the access sensing and alarm system can secure the protection of a wild animal and the safety of a passenger in a vehicle and also prevent damage or like in an access restriction area including a crop cultivation area. The present invention provides an alarm and barrier system for access prevention comprising multiple alarm units. The alarm units comprise an independent power source using sunlight and are separately installed on the top of a guardrail or a separate pole in a roadside or an access restriction area. The alarm units sense the movement or approach of a wild animal or a person who approaches a road or an access restriction area and operate the alarm. Also, the alarm units check whether the movement or approach of a wild animal or a person is sensed in at least two different alarm units adjacent mutually by communicating with another adjacent outside alarm unit, and generate an outside alarm unit actuation control signal to operate the surrounding other alarm units when the actuation of adjacent different alarm units is checked. Accordingly, the alarm and barrier system for access prevention can secure the protection of a wild animal and the safety of a passenger in a vehicle and prevent damage in an access restriction area.COPYRIGHT KIPO 2015본 발명은 태양전지와 이차전지를 이용한 독립 전원을 구비하여 도로 주변 또는 농작물 재배 영역 등의 일정 구역의 범위에서 야생동물 또는 불법접근자의 접근 감지시 가상의 차단벽을 형성함과 동시에 경보를 구동함으로써 접근하는 동물 또는 사람을 되돌려 보냄과 동시에, 도로 주변을 운행하는 운전자에게는 야생동물 출
