The invention discloses an intelligent vehicle for signing and marking lines. The intelligent vehicle comprises vehicle bodies, an upper computer and a lower computer which is arranged on the vehicle body, wherein the lower computer comprises a drawing module, a GPS (Global Position System) module, a wireless transmission module, a distance measuring device, an embedded processor, a DSP (digital signal processor) unit and an execution mechanism; and the execution mechanism is an X-Y-Z three-coordinate motion drawing color spraying head which faces towards the ground, executes the instruction sent by the DSP unit so as to calibrate the space position of the X-Y-Z three-coordinate motion drawing color spraying head. The upper computer comprises a wireless communication module, a GIS (Geographic Information System) module and a central processing unit, wherein the GIS module is used for previewing the drawings of the upper computer and navigating the lower computer. According to intelligent vehicle, the intelligent operation is adopted, the problems of irregular quality of signing and marking lines, large labor consumption, long construction time and high engineering cost caused by manual operation can be solved.