(57) [summary] [purpose] to facilitate crime prevention state change or confirmation I want to improve the usability. CONSTITUTION: A home security device comprising at least a main unit A with a security monitoring circuit A 1 for monitoring the various security sensors, and security set operating unit B, which can reverse the security state of the main unit by remote control, the main unit in, the security set receiving circuit A 2 to output the security state reversal instructions to security monitoring circuit for each to receive the security set signal from the security set operating unit, Yu voltage to be closed voltage output in response to a security state of security monitoring circuit an output unit Ry, and the signal line connection terminals T a1, T a2 for connection to the security set operation device provided on the security set operation device, the security set switch B 1 for transmitting a security set signal, chromatic voltage output unit a state display part B 2 of the display corresponding to the chromatic voltage output, and a signal line connection terminals T b1, T b2 for connection to the main device is provided.
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