The invention relates to the technical field of privacy content protection, particularly to a finger ring for keeping a diary, a
system and a using method. The finger ring comprises an annular finger ring for wearing, a support is arranged on the annular finger ring, a
control system is arranged in the support, and the
control system comprises a
gesture recognition module, a motion track sensing module, a character
library module, an instruction module, a
data processing module and a
wireless communication module, wherein after the
gesture recognition module recognizes a writing gesture, the
data processing module performs extraction of a finger track in the character
library module and recording on the input writing action, calls characters according to the signals fed back by the motion track sensing module, and then transmits the characters to the
wireless communication module, and / or the
data processing module performs instruction recognition on the input gesture action, calls an instruction according to the signals fed back by the motion track sensing module, and then transmits the characters to the
wireless communication module; and the wireless communication module is used for implementing connection recognition and information interaction between the
control system and a
cloud server or a mobile terminal.