Digital gas detection device and method

The invention discloses a digital gas detection device, including a gas detection module, a coloration length identification module and a logic calculation module that are orderly connected. The gas detection module is used for detecting the gas to be detected, so as to obtain an image of coloration length result and send the image to the coloration length identification module; the coloration length identification module is used for recognition of the image obtained by the gas detection module, so as to obtain data of length to be detected and send the data of length to be detected to the logic calculation module; and the logic calculation module is used for storing preset length data and the corresponding preset concentration data and process data of length to be detected through the preset length data and the corresponding preset concentration data, so as to obtain data of concentration to be detected corresponding to the length to be detected. Therefore, digital detection and display of gas quick detectio