Modality information indicating various functions of a multimodal document reception processing apparatus is transmitted to a multimodal document transmission apparatus, and a multimodal document, which is generated by the multimodal document transmission apparatus based on the modality information is received. A speech synthesis unit synthesizes speech of text data to be output as speech in the multimodal document, and a speech output unit outputs the synthesized output speech. A GUT display unit displays text data to be displayed in the multimodal document.