The present invention relates to a remote alarming video frequency monitoring system and method, and the system comprises: at least one image collecting device is positioned on the monitoring site to hole the real-time image collecting, and is connected with one image collecting card. The image collecting card is connected with the image information processor, and makes the collected image data transferred to an image information processor. The image information processor is a processor with image data processing function, which is the control center of the system and is connected with the wireless sending device. When abnormal condition produced in the monitoring site, the alarming signal is sent out through the wireless sending device, and is transferred to at least one receiving terminal through the wireless communication net.