The invention discloses a power grid state sensing device for distributed energy storage. The device comprises an electric energy acquisition unit, an electric energy conversion unit, an analog-to-digital conversion unit, a microprocessor, a communication unit, a state display unit, a debugging unit and a power source unit; the microprocessor controls the analog-to-digital conversion unit to complete simultaneous sampling of six paths of analog input quantities through a built-in timer, wherein the six paths of analog input quantities are an A-phase voltage, a B-phase voltage, a C-phase voltage, A-phase current, B-phase current and C-phase current; and the microprocessor receives the conversion results of the analog-to-digital conversion unit through a parallel interface, performs packet formation operation on the conversion results, sends data packets formed by packet formation to a server main station through the communication unit. According to the power grid state sensing device for distributed energy storage of the invention, the three-phase original voltage information and three-phase original current information of a power grid are acquired highly frequently in real time andare uploaded; data acquisition frequency is adjustable online or offline; and a data source can be provided for the formulation of distributed energy storage device control strategies.