A panel conveying system includes a panel cassette for receiving a plurality of panels, and a conveying vehicle for conveying the panel cassette. The conveying vehicle includes a loading/unloading unit installed on the main body to load and/or unload the panel cassette on and/or from a panel processing unit, a panel conveying unit installed on the main body to feed and/or collect the panels to and/or from a panel processing area, and a lifting unit supporting the panel cassette in the main body.