The mountain is a sacred mandala where temples of worship for the Balinese are built. This study aims to unravel the philosophical concepts that underlie various worship temple buildings on mountain peaks in Bali and reveal the struggles of conservative and progressive interests in the present era. This study is qualitative research with an interpretive descriptive method. Primary data were obtained from informants who were determined purposely. Secondary data were obtained from various library sources. The data were analysed using the theoretical basis of Roland Barthes’ Semiotics. The study results show a reading of temples built on mountain peaks spread across the island of Bali, designed based on the concepts of Rwa Bhineda, Catur Lokapala, Sad Winayaka, and Padma Bhuvana. The sacred mountain mandala, the locus of the establishment of these various temples, and where they have the status of Pura Kahyangan Jagat, Sad Kahyangan, Kahyangan Tiga, and Pura Kawitan, remain a top priority in determining Bali’s sustainable development strategy. It primarily relates to selecting a suitable pattern for developing activities and facilities to maintain the sacredness of the sacred radius of such a sacred mandala.