The history of the Annavaram temple is steeped in legend and tradition. According to local lore, the land was once owned by a Brahmin named Earanki Prakasam. Lord Vishnu appeared in his dream and instructed him to build a temple on Ratnagiri Hills. The temple was constructed in the early 20th century. The main deity, Lord Sathyanarayana Swamy, is believed to have manifested himself on the hill. Over the years, the temple has grown in prominence, attracting devotees from far and wide. The temple's administration has been instrumental in developing the infrastructure and facilities for pilgrims, making it a well-organized and accessible religious site. The temple continues to be a center of faith and devotion, preserving its rich heritage and traditions.