A service server apparatus is provided which can realize a service as if a speaker has a conversation in a face-to-face manner using existing applications. The service server apparatus includes a service activating unit receiving an instruction for performing a task during a communication, a telephone/call control unit recording a call speech of the speaker during the communication between speech communication terminal devices, a speech recognizing enabler, a text translating enabler, and a speech synthesizing enabler performing the task based on the recorded call speech when the instruction is received, and a communication control enabler providing task data obtained through an performance of the task to the speech communication terminal device. The task data is text data obtained by converting the call speech into a text, translated text data obtained by translating the text data into another language, and speech data obtained by converting the translated text data into a speech.