The starting point is the central position of solipsism in Wittgenstein's early work. The metaphysical and epistemological implications of solipsistic philosophy are explored through Wittgenstein's manuscripts and works. A key thesis is that Wittgenstein has always advocated a specific form of ontological solipsism. Against this background, the theory of signs and the conception of language games can be understood. Additionally, the issues of the theory of use and the sequence of rules in speaking must be reassessed.