A method of transferring a micro device is provided. The method includes: aligning a transfer plate with the micro device thereon with a receiving substrate having a contact pad thereon such that the micro device is above or in contact with the contact pad; moving a combination of the transfer plate with the micro device thereon and the receiving substrate into a confined space with a relative humidity greater than or equal to about 85% so as to condense some water between the micro device and the contact pad; and attaching the micro device to the contact pad.