The invention relates to a device for acquiring allergic information, a server for processing the allergic information, a system for acquiring and processing the allergic information, a method for acquiring the allergic information and a method for processing the allergic information. The device comprises a positioning unit, an allergen detection unit, a physical sign detection unit, a storing unit, a communication unit and a control unit, wherein the positioning unit is used for determining position information of the device, the allergen detection unit is used for detecting allergen information of an environment where the device is positioned, the physical sign detection unit is used for detecting physical sign information of a user of the device, the storing unit is used for storing the position information, the allergen information and the physical sign information, the communication unit is used for sending information externally, and the control unit is used for determining whether the physical sign information conforms to abnormality judgment conditions or not and sending the position information, the allergen information and abnormal information for determining that the physical sign information conforms to the abnormality judgment conditions externally under the condition that the physical sign information conforms to the abnormality judgment conditions.