Book a hotel: reserve a hotel. 预订房间。you can book a ticket, book a restaurant, book a table...'book' 作为动词，是'预定，预约'的意思 Order a hotel: they will delivery to you depend on how rich you are! you can order a pizza, order Chinese take away, order goods...'order' 是’订购‘的意思 .

booking means 1.The act of reserving (a place or passage) or engaging the services of (a person or group) 2.Arrange for and reserve (something for someone else) in advance while order means 1.A request for something to be made, supplied, or served i think its better to use your first question. cowboy...