Many satellites are used in several kinds of orbits for telecommunications, environmental observation, resource exploration, the global positioning system, and social security. These satellites are always exposed to radiations, such as electrons and protons. Charged particles accumulate in the bulk of the surface materials of spacecraft and lead to electrostatic discharge (ESD) phenomena. ESD is the origin of satellite anomalies; hence, we should investigate charge accumulation phenomena in the bulk of satellites surface materials. In this study, we focused on the charge accumulation phenomena in polymethyl methacrylate (PMMA) and highly purified quartz glass using the pulsed electroacoustic (PEA) method. From our study, we could confirm the positive charge accumulation in the materials irradiated by protons except for the case of a quartz glass with an Al evaporated layer on the irradiated side. From the results, we considered the reasons that the positive charge accumulated in PMMA and quartz glass while no charge accumulated in the quartz glass with the Al evaporated layer.