When　light　propagating　through　combustion　flame　environments,　it　deviates　from　original　trajectory　due　to　the　scattering　effect　caused　by　combustion　particulates.　This　behavior　reduces　the　spatial　positioning　accuracy　in　tomographic　radiation　thermometry　of　flame.　In　order　to　overcome　this　problem,　we　investigate　the　characteristics　of　light　transmission　direction　related　to　the　wavelength　theoretically　and　experimentally.　The　tomographic　imaging　system　with　number　of　four　detection　channels　is　built　based　on　optoelectromechanical　integration　structure.　The　wavelength　least　affected　by　combustion　flame　is　selected　and　employed　to　the　established　tomographic　imager.　With　the　aid　of　tomography　data,　the　spatiotemporal　evolutions　of　temperature　can　be　further　reconstructed　by　utilizing　Planck　law.　These　results　demonstrate　the　effectiveness　of　proposed　method　and　can　be　applied　to　the　field　of　combustion　diagnosis.