An intelligent monitoring device comprising a video capture unit, a camera, an audio processing unit, a pickup, an audio/video analysis unit, a control unit, a speaker, a smell sensor and a smell analysis unit, wherein: the video capture unit is used to collect video information using the camera in real time, the camera comprising a first camera and a second camera with night vision function; the audio processing unit is used to collect audio information using the pickup in real time; the audio/video analysis unit is used to perform a recognition analysis on the video information and the audio information collected in real time and send an analysis result to the control unit, wherein the audio/video analysis unit particularly determines, according to the video information, whether a current environment light intensity is greater than a predetermined light intensity threshold value; the smell analysis unit is used to perform a detection analysis on smell information collected by the smell sensor in real time and send an analysis result to the control unit; the control unit is used to, according to the analysis result sent from the audio/video analysis unit, if a monitored value that is greater than a corresponding threshold value exists in the video information or audio information collected in real time, trigger the speaker to issue an alarm through the audio processing unit; the control unit is further used to, according to the analysis result of the smell analysis unit, if a concentration of a smoke or organic volatile gas is greater than a corresponding concentration threshold value, trigger the speaker to issue an alarm through the audio processing unit; the control unit triggers the video capture unit to collect video information via the first camera when the device is activated, and is further used to, according to the analysis result sent from the audio/video analysis unit, if the current environment light intensity is greater than the predetermined light intensity threshold value, trigger the video capture unit to collect video information via the first camera; if the current environment light intensity is not greater than the predetermined light intensity threshold value, trigger the video capture unit to collect video information via the second camera. the video capture unit is used to collect video information using the camera in real time, the camera comprising a first camera and a second camera with night vision function; the audio processing unit is used to collect audio information using the pickup in real time; the audio/video analysis unit is used to perform a recognition analysis on the video information and the audio information collected in real time and send an analysis result to the control unit, wherein the audio/video analysis unit particularly determines, according to the video information, whether a current environment light intensity is greater than a predetermined light intensity threshold value; the smell analysis unit is used to perform a detection analysis on smell information collected by the smell sensor in real time and send an analysis result to the control unit; the control unit is used to, according to the analysis result sent from the audio/video analysis unit, if a monitored value that is greater than a corresponding threshold value exists in the video information or audio information collected in real time, trigger the speaker to issue an alarm through the audio processing unit; the control unit is further used to, according to the analysis result of the smell analysis unit, if a concentration of a smoke or organic volatile gas is greater than a corresponding concentration threshold value, trigger the speaker to issue an alarm through the audio processing unit; the control unit triggers the video capture unit to collect video information via the first camera when the device is activated, and is further used to, according to the analysis result sent from the audio/video analysis unit, if the current environment light intensity is greater than the predetermined light intensity threshold value, trigger the video capture unit to collect video information via the first camera; if the current environment light intensity is not greater than the predetermined light intensity threshold value, trigger the video capture unit to collect video information via the second camera.