PROBLEM TO BE SOLVED: To provide a temperature detection system for a high temperature type fuel battery which does not detect temperature in a high temperature field, is easy in maintenance, and makes it easy to maintain the high temperature field required for the high temperature type fuel battery to generate power.SOLUTION: A temperature detection system 1 for a high temperature type fuel battery comprises: an intra-container temperature transmission member 30; and transmission member adiabatic material 40. The intra-container temperature transmission member 30 is constituted by material having thermal conductivity, and has one end part arranged in a fuel battery accommodation space 23 and another end part arranged in an external space of an adiabatic wall 21 while penetrating a through hole 22 on the adiabatic wall 21. The transmission member adiabatic material 40 is constituted by adiabatic material, and covers the outer periphery of the intra-container temperature transmission member 30 from the one end
