There is provided an audio information providing system that can solve the problem with the audio lag and includes navigation with higher accuracy. The audio information providing system is an audio guidance system including an audio output device that is worn in the ear of a user and an information processing terminal that is communicatively connected to the audio output device. The audio output device includes: an audio output unit configured to output audio to the ear of the user; and a detection unit configured to detect the direction of the head of the user. The information processing terminal includes: a position information acquiring unit configured to acquire a current position of the user; and a generation unit configured to generate audio data which is used for the audio output unit to output audio guidance for a route to a destination to which the user moves from a direction of the destination relative to the direction of the head of the user on the basis of a relationship among position information of the destination, the current position of the user, and information on the direction of the head of the user.