By introducing phase and fringe technique to optical 3-D object measurement,handheld phase target is proposed. With vision measurment technology,any contacted point of measure object can be measured directly by the target. In addition,the distance between control points of handheld phase target and measurement point ,and the coordinates of the probe of target coordinate system can be obtained by adopting phase technique and the full optical field fringes analysis. In the same way,3-D coordinate of measurement point on the object can be calculated accurately. Error analysis about 3-D coordinate of measured points is done and the corresponding distance excursion is also obtained. The accurate measurement result can be obtained in the experiments so that the analysis is proved to be right.