Studies on original innovation mostly focus on its concepts, characteristics, and its influence on firm performance and competitive power. There are relatively few studies about the triggering mechanism of original innovation. Based on innovation theory, stakeholder theory, and motivated information processing theory, this study analyzed factors triggering original innovation and the triggering paths from the perspective of stakeholder view, and then proposed the theoretical triggering mechanism model of original innovation. Research concludes that stakeholders play their roles in original innovation through two paths: the first path is that firm’s taking thoughts or evaluations of users provides filtering mechanism, which helps delete new and useless ideas, ensuring the usefulness of innovation ideas; the second path is that knowledge-based firm reputation built by stakeholders functions as signal mechanism, triggering firm’s original innovation and facilitating innovation commercialization. Our study enriches literature on original innovation, and proposes theoretical support and practical advices for Chinese firms’ original innovation.