1. A method for detecting an image corresponding to at least a monetary banknote and performing a currency type analysis operation on the image, comprising: selecting a detection procedure from a plurality of different detection procedures; verifying the image according to the selected detection procedure; respectively assigning a plurality of bit values to a plurality of currency types to create a currency type definition table; performing a color analysis operation on the image to generate a color analysis operation result; and determining a currency type of the image according to the color analysis operation result and the currency type definition table.