1. A time-sequential multi-spectrum imaging device comprising: a lens module coupled with a sensor, the lens module being provided for imaging; a sensor coupled with the lens module for sensing images; a multi-spectrum filter wheel embedded in the lens module; the multi-spectrum filter wheel comprising a plurality of filters and a plurality of driving marks, wherein each one of the plurality of filters corresponds to a different filter spectrum region and a different one of the plurality of driving marks; the wheel and a detector of a control module of the sensor detecting a driving signal from one of the plurality of driving marks; the wheel switching the image acquiring spectrum for the multi-spectrum images acquisition; a driving module of the wheel coupled with the multi-spectrum filter wheel and a control module of the wheel and the sensor; the driving module driving the multi-spectrum filter wheel to rotate and the control module of the wheel and the sensor controlling the rotating speed; the control module of the wheel and the sensor coupled with the driving module of the wheel, an image acquiring module, and an inertia measuring system; the control module using the detector to sense the driving mark and transmitting out a control signal to the image acquiring module, the driving module of the wheel, and the inertia measuring system; the image acquiring module being provided for controlling and adjusting the timing in acquiring the multi-spectrum images; the image acquiring module coupled with the sensor, the control module of the wheel and the sensor, a display, and a image data recorder; the image acquiring module receiving the control signal from the control module of the wheel and the sensor, reading image data from the sensor, and transmitting the image data to the display and the image data recorder; the display coupled with the image acquiring module; an inertia measuring system coupled with the control module of the wheel and the sensor for measuring a state and a position of the wheel; and the image data recorder coupled with the image acquiring module for receiving and storing the image data from the image acquiring module; wherein the time-sequential multi-spectrum imaging device uses the time-sequential multi-spectrum image acquiring method, which comprises: based on the type of the sensor, the sampling rate, and the required task, setting a sequential time and rotating speed of the multi-spectrum filter wheel at the control module of the wheel and the sensor; the control module of the wheel and the sensor transmitting a wheel driving signal to the driving module of the wheel based on the preset sequential time and rotating speed to let the multi-spectrum filter wheel rotate according to the preset sequential time and rotating speed; during the rotation of the multi-spectrum filter wheel, the detector of the control module of the wheel and the sensor sweeping through the multi-spectrum filter wheel for one circle and detecting a driving mark, which means the incident light from the lens is now in another filter spectrum region, then the detector transmitting a trigger signal to the control module of the wheel and the sensor; the control module of the wheel and the sensor processing the trigger signal and transmitting a charge coupled device trigger signal and an image acquiring module control signal to the image acquiring module, and transmitting a trigger event signal to the inertia measuring system; the image acquiring module transmitting the charge coupled device trigger signal to the sensor; the sensor integrating the image data for the image acquiring module to read the image data in the sensor; the image acquiring module transmitting the image data to the display and the image data recorder; the image data recorder providing the image data to a back end software and to the display for displaying real time images; the inertia measuring system obtaining orientation data and position data from the gyro and GPS device; wherein the time-sequential multi-spectrum imaging device is adapted to utilize airborne remote sensing image-taking in air.