This invention relates to an imaging apparatus and an imaging method for supplying an optimum amount of image data to another apparatus. When a PDA 91 has a maximum transfer rate of 1.5 Mbps, a mobile phone 1 determines that a maximum speed of communication with the PDA 91 is low, reduces accordingly the amount of moving image data captured by a CCD of the mobile phone, and supplies the captured moving image data to the PDA 91. The PDA 91 displays a low-quality moving image 93 on its display unit. When the PDA 91 has a maximum transfer rate of 480 Mbps, the CPU of the mobile phone leaves unchanged the amount of moving picture data captured by the CCD and supplies the captured moving image data to the PDA 91. The PDA 91 then displays a high-quality moving image 94 on the display unit. This invention applies advantageously to digital cameras.