The invention discloses a method for conducting voice interaction through a Bluetooth headset and a mobile terminal, and a system. The method comprises the steps as follows: firstly, establishing the correlation between the Bluetooth headset and a voice assistant of the mobile terminal, and arranging a button on the Bluetooth headset and operating the voice assistant through the button; secondly, real-time monitoring a user when the user pressed on the button for the first time, turning on the voice assistant, receiving a voice command inputted by the user, and pressing the button for sending out the voice command after the input is completed; thirdly, recognizing the voice command inputted by the user, and announcing a voice command result according to the input voice command; fourthly, real-time monitoring the user when the user pressed on the button for a second time, obtaining the present state of the voice assistant, stopping the announcing when the present state is an voice command result announcing state, and starting recording when the present state is an idle state. According to the method and the system provided by the invention, as a recording function is arranged on the voice assistant additionally, the operation of the Bluetooth headset is enabled to be more intelligent, and the user experience is improved.