Due　to　the　possibility　of　controlling　electromagnetic　waves,　intelligent　metasurfaces　have　attracted　considerable　attention.　With　the　development　of　wireless　communication,　the　demand　for　accurate　positioning　and　electromagnetic　radiation　testing　is　increasing.　This　paper　proposes　an　intelligent　transmission　surface　(ITS)　that　can　achieve　complete　2π　full　phase　coverage,　and　introduce　an　induced　field　localization　method　based　on　it,　the　method　fully　considers　the　spherical　wavefront　characteristics　of　the　induced　field　and　achieves　accurate　localization.　Traditional　methods　of　electromagnetic　radiation　measurement　often　require　complex　instruments　and　time-consuming　data　processing,　which　limit　the　real-time　measurement　and　analysis　of　the　induced　field,　a　fast　measurement　method　of　induced　field　electromagnetic　radiation　based　on　ITS　is　also　proposed.　ITS　can　be　adjusted　to　achieve　optimal　transmission　and　modulation　of　electromagnetic　waves　so　as　to　realize　the　rapid　capture　and　measurement　of　electromagnetic　radiation.　Finally,　this　paper　also　reveals　the　conversion　law　between　the　induced　field　and　the　transmitted　far　field.　Revealing　this　law　helps　us　to　better　understand　the　nature　and　propagation　mechanism　of　the　induced　field,　which　is　of　great　importance　for　the　localization　of　the　induced　field　and　the　fast　measurement　of　electromagnetic　radiation.　©　2023　IEEE.