Abstract: A secure portable patrol system including a portable patrol device and a base unit is revealed. The patrol device is a portable rectangular body disposed with a multi-image display screen on a front surface thereof. The patrol device is disposed with an IR image capture unit, a wireless call unit and a first SIM card communication unit so that users can perform multiple tasks by the single patrol device such as checking whether there is area that overheats or abnormal conditions that occur. The base unit includes a specific transmitter while the patrol device is set with a specific port for electrical connection to the specific transmitter. Thereby the patrol device and the base unit are electrically connected for secure data transmission.