A wireless ITE (In-The-Ear) type hearing aid system having a remote control function, is provided, which includes: left and right hearing aids respectively inserted into ears and controls individually built-in features depending on a remote control signal applied in a near field magnetic induction (NFMI) method; a smart device that individually remote controls functions; and a wireless relay module that transmits and receives the audio signals and various information signals in the NFMI method, and that processes individual remote control signals in which the individual remote control signals are transmitted from the smart device via a near field communication (NFC) method. ITE type hearing aids are configured to operate with a smartphone in a wireless communication method, to then enable the smartphone to selectively control inherent functions, and to thereby maximize the ease of operation of a hearing aid wearer.