how can I obtain visa easily of the Hong kong when proceeding what documents do I need?

Ganesh, if it's your first time to Hong Kong, I'm afraid you have to directly contact the HK Immigration Department and send your application documents there. The application documents include a photocopy of your passport, a filled application form, a recently taken passport style photo, a photocopy of your transport tickets and hotel reservations, a photocopy of your financial standing proof, and a photocopy of your travel itinerary.