Abstract: In order to analyze the effect of relative location of heating surface on microbubble emission boiling (MEB), the subcooled boiling occurred on an imbedded heating surface was experimentally studied, and compared with that on a flush heating surface. At liquid subcooling of 25-50 K, MEB was observed on an imbedded heating surface that lowers tank bottom for 3 mm. The heat flux in MEB reaches 5.55 MW/m² at liquid subcooling of 50 K. Visualized results indicate that a vapor film forms on the heating surface, and expands and shrinks frequently in regime of MEB occurred on the imbedded heating surface. The increase of liquid subcooling enlarges the period of expansion and shrinkage of the film while has limited effect on its amplitude. Furthermore, the lateral expansion of vapor film in MEB can be limited by the surrounding edge of the imbedded heating surface significantly.