The invention discloses a measuring system being able to measure a side surface or inside and being able to realize automatic feeding and blanking. The measuring system includes a control system, an operating platform, a first guide rail assembly, an automatic feeding and blanking assembly, a measuring assembly and at least one carrier assembly, wherein the first guide rail assembly includes a left bearer, a right bearer and a first guide rail; the left bearer and the right bearer are fixedly connected with the operating platform; the measuring assembly can slide and move back and forth along the first guide rail; the automatic feeding and blanking assembly is arranged on the operating platform; the automatic feeding and blanking assembly is provided with a material suction assembly; the carrier assembly is provided with an optical deflector which is used for deflecting the light from a side surface or an internal structure of an object to be measured; and the measuring assembly, the automatic feeding and blanking assembly and the carrier assembly are electrically connected with the control system. By means of reduction of the steps of manual auxiliary operation, the measuring system being able to measure a side surface or inside and being able to realize automatic feeding and blanking can improve the degree of precision, can improve the measuring accuracy of the side surface and the internal structure of the object to be measured, and can improve the success rate and the efficiency for measurement.