The present disclosure illustrates a speaker apparatus and a speaker apparatus system, wherein the speaker apparatus includes a communication unit, an audio codec, a sound unit and a clock unit. The audio codec is coupled to the communication unit. The sound unit is coupled to the audio codec. The clock unit is coupled to the communication unit. The communication unit is configured for wirelessly receiving and broadcasting audio data. The audio codec is configured for decoding the audio data and generating an analog signal according to the decoded audio data. The sound unit is configured for transforming the analog signal into an acoustic wave. The clock unit synchronizes with at least one other speaker apparatuses by a synchronous signal.