The invention is a surface plasma syntonizing and surface enhanced Raman spectrum measure apparatus. Its main structure consists of laser source 21, angular instrument of initiate angle and polarize status adjustable together with polarize fins forms the light source system; sample table consists of edge glass of semi-circular or right angle or hemisphere and a basal chip with SERS activity. SERS signal detecting system made up of spectrograph and CCD detector. SPR signal detector is installed on one side of the edge glass while the light source system on the other side. The invention is adopted with the SPR detecting method of variable angle internal reflection, initiating the sample in the elapse field to obtain the SERS spectrum, and synchronizingly obtaining the SPR spectrum and the further enhanced SERS spectrum under syntonizing enhancing angle. Higher detecting sensitivity and s/n ratio can be obtained when measuring the SERS signal under dim background.