Is there a temple in Kailash Manasarovar ? 

Is there a temple in Kailash Manasarovar area? where people do Puja in Kailash?

There is no Temple at Kailash Mansarovar. The main crown Jwel is Kailash parvat which is known as Sumeru Parvat which everyone worships or prays too. The Kailash parvat itself is Maha shiva Lingam. At Manasarovar, people take holy baths and do Puja or havan at the Bank of the Lake. At the North face Diraphuk, and at Dolma la pilgrimage do some Puja, worship or burn lamp or incense.  At Shivastal and also at Tharboche ( Yama Dwar) people leave old clothes or nails or hair believing that they get rebirth or new life. It is a very holy land itself and most of the people say that they saw Lord Shiva, Hanuman, Shesnaag, Parvati, or Apsara there. It all depends on your belief and imagination. There are holy caves around Kailash Mansarovar where many gurus, masters, and saints have meditated in the past. You can practice some Meditation there as well.