To provide a method and apparatus for reliably killing and exterminating noxious organisms attached to vehicles without taking time and effort for heat treatment, the method and apparatus being able to be installed in port facilities where various facilities are already installed.SOLUTION: The method includes: disposing a temperature sensor C at a position where the temperature is lowest within a vehicle B before opening a carry-in/out door 15 to carry the vehicle B into a heat treatment chamber 10 or before carrying the vehicle into the heat treatment chamber; and driving and controlling a heater 21 and a fan 22 of a heating device 20 for heat treatment of the vehicle while monitoring intra-vehicle temperature information from the temperature sensor C.SELECTED DRAWING: Figure 4【課題】各種施設が既に設置されている港湾施設内でも設置が可能で、また熱処理に手間がかからず、車輛に付着した有害生物を確実に死滅させて駆除する方法および装置を提供すること。【解決手段】搬入・搬出ドア15を開き、車輛Bを熱処理室10内に搬入した後、あるいは搬入する前に、車輛B内の最も温度が低い個所に温度センサーCを配置し、温度センサーCからの車輛内温度情報をモニターで監視しつつ、加熱装置20のヒーター21、ファン22を駆動し、制御して車輛を熱処理する。【選択図】図4