  Quantum measurement is a fundamental concept in the field of quantum
mechanics. The action of quantum measurement, leading the superposition state
of the measured quantum system into a definite output state, not only
reconciles contradictions between quantum and classical mechanics but also
facilitates quantum state manipulations, including reading and resetting.
Despite its significance, four fundamental issues -- randomness,
instantaneousness, irreversibility, and preferred-basis -- continue to pose
significant challenges to the broader application of quantum measurement and
our overall understanding of quantum mechanics. In this work, we employ a new
space-time approach to relativistic quantum mechanics to address these issues
systematically. Our approach provides a comprehensive elucidation of the
intricate connections between quantum measurement and quantum unitary
evolution, as well as an in-depth analysis for the interdependence of non-local
correlations and relativistic theories. We thereby reveal a more fundamental
dynamical theory, beyond the traditional time-evolution equation in quantum
mechanics, where the axioms of quantum measurement naturally emerge as a
corollary. These findings contribute to the advancement of related fields, and
our work holds potential implications for future research and applications in
the realm of quantum mechanics.
