In order to provide fresh space for blue economic development, promote the building of China's maritime might, and lessen the various constraints on resources, the ecological environment, and spatial utilization in China's nearshore seas, it is imperative that deep and far sea space be utilized. This study focuses on the analysis of deep-sea spatial patterns with multiple factors, dimensions, and long-term time series. A recognition method based on multi-source data spatialization is constructed, and "three types of spaces" are laid out with the eastern Guangdong as the empirical object. The spatiotemporal characteristics of various sea use activities are explored, and spatial use management rules are established.The study's findings show that: 1) Deep and far sea space can be categorized into three areas: protection, preservation, and utilization; these areas correspond to the protection functions of preserving national interests and ecology, as well as to reserve blank area, to development and utilization functions. 2) In the eastern Guangdong offshore research region, the percentage of protected space is 46%, greater than the percentages of reserved space (43%) and usage space (11%). Ecological protection, free navigation, mineral exploration is prioritized over other development and utilization activities. 3) Analyzing the spatiotemporal trajectory and conflict relationship of sea use activities, combining mobility, vertical depths, and time scales with spatial occupancy range to characterize the features of sea use activities; and proposing spatial access rules with the aim of optimizing spatial resources and fine-tuning management. The research findings can aid in decision-making for encouraging the use of deep and far sea space and enhancing China's national spatial planning system. They also have some reference value for the theoretical and methodological study of marine spatial layout.