An Introduction to SIO Philosophy proposes a first-principles revolution in metaphysics, cognition, and value theory. It challenges the inherited picture in which "subject" and "object" exist first and "interaction" merely connects them afterward. SIO argues the opposite: existence is a generative whole, and the distinctions of subjectivity, interaction, and objectivity arise as different emphases of one unfolding field. The book's central mechanism is positional manifestation. Every lived event contains S, I, and O simultaneously, yet perception, language, and culture tend to tilt toward one position as dominant. When experience leans toward O, a continuous field is discretized through contrast and boundary: the world appears as stable, nameable things, and object-consciousness becomes primary. When experience leans toward I, the foreground shifts to time, rhythm, and resonance: processes and coordination become primary, and interaction-consciousness emerges as the felt reality of "what is happening." When experience leans toward S, dispersed moments integrate into connection, order, and structure: a self appears, not as a hidden inner substance, but as an integrative structural event produced by multi-SIO linkage.

These emphases can interweave, convert, and misalign, explaining why "self," "world," and interaction vary across contexts, developmental stages, and civilizational styles. On this foundation, the book reconstructs Truth-Goodness-Beauty as intrinsic quality-states of SIO rather than external norms or private tastes. Truth is the lived stability and repeatability of manifested structure; goodness is the smoothness and viability of interaction-reduced friction and higher resonance; beauty is structural coherence across multiple SIOs, a real harmony that invites continuation rather than a merely subjective preference. The work further introduces the Three Laws of Meaning-Creation, Happiness, Freedom as a dynamic cycle of generative life: creation builds new structures, happiness integrates and releases tension into renewed vitality, and freedom expands the space of possible pathways. Finally, SIO functions as a methodological knife for reframing long-standing philosophical deadlocks and offers a unifying framework with practical implications for AI, education, ethics, aesthetics, and civilization analysis.