The DAPJ (Journal of Data Acquisition and Processing)has focused on publishing papers on the theory and applications of signal, data and information for 30 years, ranging from A/D converter in the early days to modern DSP and FPGA processing chip, from fractal technology and theory of wavelet to speech recognition and image processing, from neural network to deep learning, and from wireless communication to optical communication. The DAPJ,like a mirror, always reflects the latest development in the field of signal, data and information processing. This paper makes a brief summary about the history and current research of signal, data and information processing, and looks forward to the future developments of DAPJ, which will serve as the guildlines for the contents to be published on this journal.