This chapter systematically explores the general methodologies utilized in geothermal exploration, focusing on geologic, geochemical, and geophysical approaches. Geothermal development progresses from identifying subsurface geothermal reservoirs to installing energy production infrastructure. Initial exploration relies on analyzing unknown subsurface structures and estimating reservoir potential. Geologic exploration employs remote sensing, structural analysis, and alteration zone mapping techniques to identify heat sources and reservoir characteristics. Geochemical exploration emphasizes fluid analysis, geothermometers, and mixing models to estimate reservoir conditions. Geophysical exploration, including gravity and resistivity methods, provides critical insights into subsurface structures by analyzing physical anomalies. The magnetotelluric (MT) method is particularly emphasized for its efficiency in detecting low resistivity zones associated with geothermal reservoirs. Case studies highlight the importance of integrating multidisciplinary approaches for successful geothermal resource identification, reducing exploration risks, and enhancing drilling accuracy.