The goals of cost reduction and efficiency increase in the oil and gas industry, the demands for environment protection development, and the rapid development of integrated geological engineering technology have posed new challenges and requirements for wellbore working fluids. After the working fluids contact with the formation during the fracturing process, a series of physical or chemical reactions occur. It not only affects the effectiveness of hydraulic fracturing, but also closely relates to the process of shut-in and backflow after fracturing, thereby affecting the subsequent production of oil and gas wells. In addition, the different working fluid systems also faces some problems such as homogenization waste, functional singularity and physicochemical incompatibility. Therefore, clarifying the required characteristics and research status of the working fluids at each stage is of great significance for the development of integrated working fluids. Based on this, the characteristics that the working fluid needs to meet and current results in various stages such as fracturing, shut-in, and flowback are elaborated. The characteristics and research status for polymer, surfactant, foam and gas working fluids are emphatically described. By summarizing the characteristics of working fluids mentioned above, the discussion and outlook on integrated working fluids are conducted around three aspects: "synergistic effect of fracturing and extraction", "temporary plugging of fracturing to improve liquid energy efficiency", and "low-carbon, green integrated working fluids". The integrated working fluid involves a broad range of researches and techniques. It is necessary to strengthen the collaborative studies between multiple processes, which can provide a reference for the development and enhancement of the integrated working fluids during fracturing, shut-in and backflow.