Image communications apparatus using voip and operating method thereof

A video communication device using VoIP(Voice over Internet Protocol) and an operation method thereof are provided to mount a VoIP network on a display device such as a monitor operable by interworking with a PC(Personal Computer), and to realize free video communication calls between display devices, thus users can freely transceive and convert voice and text. A data receiver(100) receives at least one of data signals among video data, voice data, and text data through VoIP communication. A data processing controller(300) converts the received voice data into text data, or converts the text data into voice data. A voice output unit(400) outputs the processed voice data as a voice signal. A display unit(500) outputs the processed text data as a text signal. The data processing controller(300) consists of a voice converter for converting the inputted text data into the voice signal, and a text converter for converting the inputted voice data into text.