Adhimooleswarar temple complex has two prakarams (outer courtyard) and a small five-tiered rajagopuram (gateway tower). The central shrine faces east and holds the image of Adhimooleswarar (Shiva) in the form of a granite lingam. The granite images of the deities Ganesha (son of Shiva and god of wisdom), Murugan (son of Shiva and god of war), Nandi (the bull and vehicle of Shiva), and Navagraha (nine planetary deities) are located in the hall leading to the sanctum.
The hall leading to the sanctum also has the South facing shrine of Nithyakalyani (Parvati), the consort of Adhimooleswarar, in standing posture. As in other Shiva temples of Tamil Nadu, the first precinct or the walls around the sanctum have images of Dakshinamurthy (Shiva as the Teacher), Durga (warrior-goddess), and Chandikeswarar (a saint and devotee of Shiva). There are also images of Bhikshatana, Dakshinamurthy sporting a Veena, and Vishnu. The first precinct is surrounded by granite walls.
Bhikshatana and Veena-holding Dakshinamurthy sculptures in the temple
It is one of the shrines of the 275 Paadal Petra Sthalams - Shiva Sthalams glorified in the early medieval Tevaram poems by Tamil Saivite Nayanar Tirugnanasambandar.
Tirugnanasambandar describes the feature of the deity as:
மாகந் தோய்மதி சூடி மகிழ்ந்தென
தாகம் பொன்னிற மாக்கினார்
பாகம் பெண்ணு முடையவர் பாற்றுறை
நாகம் ழுண்ட நயவரே.