A screen sounder includes a housing having a front case, a screen supported by the front case, a piezoelectric module mounted with the screen for driving the screen to generate sound or converting vibration of the screen into electric energy, an audio signal source electrically connecting to the piezoelectric module for driving the piezoelectric module to vibrate, a rechargeable module electrically connecting to the piezoelectric module for receiving the electric energy, and a switching control unit electrically connecting with the piezoelectric module for switching the electrical connections between the audio signal source, the rechargeable module and the piezoelectric module.