1. An image analysis system for determining cancerous cells comprising: an acquisition module including: a carrier unit loading a sample of suspected cancerous cells; an illuminating unit illuminating the sample of the suspected cancerous cells on the carrier unit as a lighting source; and an enlarging unit disposed on the carrier unit, with the enlarging unit enlarging an image of the sample of the suspected cancerous cells to be recognized; an image capturing module located at an output path of the acquisition module and including: a charge-coupled device directly receiving an enlarged image of the sample of the suspected cancerous cells from the enlarging unit; a lens unit mounted on the charge-coupled device and focused on the enlarged image to sharpen the enlarged image and transmit the sharpened enlarged image of the suspected cancerous cells to the charge-coupled device; and a capturing unit connected with the charge-coupled device, with the capturing unit capturing the sharpened enlarged image of the suspected cancerous cells; a multi-spectral image reproduction module utilizing a spectral analysis, a color gain and an image reproduction to retreat the sharpened enlarged image of the suspected cancerous cells captured from the capturing unit, contouring the suspected cancerous cells in the sharpened enlarged image to recognize locations of the suspected cancerous cells, analyzing the contoured suspected cancerous cells in the sharpened enlarged image to obtain an average penetration spectrum of the contoured suspected cancerous cells, classifying the sharpened enlarged image of the suspected cancerous cells to four cancerous stages based on a descending trend of the average penetration spectrum, raising color differences of the suspected cancerous cells of the four cancerous stages, and obtaining representations of the contoured suspected cancerous cells to determine one of the four cancerous stages to which the suspected cancerous cells pertains based on a spectral database of cancerous cells.