This chapter explores the theoretical foundations and high-tech hardware developments in the fascinating arena of quantum computing technology. It begins by dissecting the basic concepts of quantum mechanics, emphasizing the ideas related to entanglement and superposition, which provide the exponential potential of quantum computation. Next, we take you on a tour of the various hardware platforms, highlighting their distinct advantages and disadvantages, such as trapped ions, superconducting circuits, and topological materials. We also explore Software Technologies like Quantum Programming Languages (QPL) and the difficulties in developing and putting into practice algorithms that fully utilize these novel computational paradigms, delving into the rapidly developing subject of quantum software development. There were also some Supporting Technologies that we illustrate, like High-Performance Computing (HPC), Cloud Computing, and Quantum Networking. In conclusion, we investigate the possible uses of quantum computing in a range of fields, such as codebreaking, financial modeling, drug development, and materials science, emphasizing how revolutionary it might be for both scientific and commercial undertakings. Readers will have a thorough understanding of the high-tech quantum computing technology with its significant implications for innovation and computing in the future by the end of this chapter.