A method for tracking a moving trajectory based on human features, comprising the following steps: step 1: an image capturing unit carried on a cloud terrace system comprising a zooming CCD camera and an infrared thermal imager; simultaneously performing image capturing on a monitoring environment by the zooming CCD camera and the infrared thermal imager; transmitting a captured image to an intelligent analysis unit A by the zooming CCD camera; and transmitting a captured image to an intelligent analysis unit B by the infrared thermal imager; step 2: performing image algorithm analysis on the image captured by the zooming CCD camera through a human feature identifying module carried by the intelligent analysis unit A, and detecting and separating the information of a human dynamic profile, a head, hands and feet, extracting blocking features of image information and building a histogram; contrasting and matching the extracted blocking features with a human feature library by adopting a decision tree classifier; and detecting a target moving human body from the images by a moving object detecting module carried by the intelligent analysis unit A by adopting a method for extracting a moving target in a gray image sequence; step 3: adopting edge detection in the image captured by the infrared thermal imager through the intelligent analysis unit B to detect a human boundary; step 4: obtaining analysis data in real time by a main control unit from the intelligent analysis unit A and the intelligent analysis unit B, computing the proportion of the size of the target moving human body in the size of the whole image, and a deviation angle and direction of the moving target and an optical axis, and transmitting a horizontal deviation value and a vertical deviation value for deviation from the optical axis, and a size proportion value to a cloud terrace control unit; and step 5: controlling the horizontal angle of a cloud terrace system, the vertical angle of the cloud terrace system and the focal distance of the zooming CCD camera by the cloud terrace control unit according to the horizontal deviation value, the vertical deviation value and the size proportion value of the moving target so that the moving target is always in the middle of the visual field of the zooming CCD camera, thereby realizing tracking on a human moving trajectory; wherein the cloud terrace control unit controls the zooming CCD camera and the infrared thermal imager to perform 120° rotation in a vertical direction and perform 360° rotation in a horizontal direction. step 1: an image capturing unit carried on a cloud terrace system comprising a zooming CCD camera and an infrared thermal imager; simultaneously performing image capturing on a monitoring environment by the zooming CCD camera and the infrared thermal imager; transmitting a captured image to an intelligent analysis unit A by the zooming CCD camera; and transmitting a captured image to an intelligent analysis unit B by the infrared thermal imager; step 2: performing image algorithm analysis on the image captured by the zooming CCD camera through a human feature identifying module carried by the intelligent analysis unit A, and detecting and separating the information of a human dynamic profile, a head, hands and feet, extracting blocking features of image information and building a histogram; contrasting and matching the extracted blocking features with a human feature library by adopting a decision tree classifier; and detecting a target moving human body from the images by a moving object detecting module carried by the intelligent analysis unit A by adopting a method for extracting a moving target in a gray image sequence; step 3: adopting edge detection in the image captured by the infrared thermal imager through the intelligent analysis unit B to detect a human boundary; step 4: obtaining analysis data in real time by a main control unit from the intelligent analysis unit A and the intelligent analysis unit B, computing the proportion of the size of the target moving human body in the size of the whole image, and a deviation angle and direction of the moving target and an optical axis, and transmitting a horizontal deviation value and a vertical deviation value for deviation from the optical axis, and a size proportion value to a cloud terrace control unit; and step 5: controlling the horizontal angle of a cloud terrace system, the vertical angle of the cloud terrace system and the focal distance of the zooming CCD camera by the cloud terrace control unit according to the horizontal deviation value, the vertical deviation value and the size proportion value of the moving target so that the moving target is always in the middle of the visual field of the zooming CCD camera, thereby realizing tracking on a human moving trajectory; wherein the cloud terrace control unit controls the zooming CCD camera and the infrared thermal imager to perform 120° rotation in a vertical direction and perform 360° rotation in a horizontal direction.