A liquid crystal display (LCD) panel and a LCD device using the same are provided. The LCD panel includes a first substrate, a second substrate, a liquid crystal layer, an optical filter layer and a color conversion layer. The first substrate and the second substrate correspond to each other and seal the liquid crystal layer. Several pixels are constituted by the first substrate and the second substrate. The optical filter layer is disposed on the first substrate for a first color light to pass through. The color conversion layer is disposed at the second substrate. The color conversion layer has a first color conversion area, a second color conversion area and a passing area in each pixel, such that a second color light and a third color light are produced after the first color light passes through the first color conversion area and the second color conversion area, respectively.