A light-emitting diode light bulb structure, characterized in comprising: a glass stem; a first power wire and a second power wire mounted in the glass stem with one end of each of the first power wire and the second power wire protruding beyond the glass stem; a first conducting bar having one end thereof connected with the end of the first power wire protruding beyond the glass stem; a second conducting bar having one end thereof connected with the end of the second power wire protruding beyond the glass stem; a first light-emitting module having: a top horizontal bar assembly and a bottom horizontal bar assembly, wherein one end of each of the top horizontal bar assembly and the bottom horizontal bar assembly is connected with the first conducting bar, and the other end of each of the horizontal bar assembly and the bottom horizontal bar assembly is connected with the second conducting bar; multiple fixing balls (42, 44, 46, 48a, 48b) mounted on the top horizontal bar assembly and the bottom horizontal bar assembly and spaced apart to form multiple breakpoints; and multiple LED filaments (41, 43, 45, 47) mounted between the top horizontal bar assembly and the bottom horizontal bar assembly to form an alternating U-shaped series-connected circuit loop passing through the multiple LED filaments and the top horizontal bar assembly and the bottom horizontal bar assembly. a glass stem; a first power wire and a second power wire mounted in the glass stem with one end of each of the first power wire and the second power wire protruding beyond the glass stem; a first conducting bar having one end thereof connected with the end of the first power wire protruding beyond the glass stem; a second conducting bar having one end thereof connected with the end of the second power wire protruding beyond the glass stem; a first light-emitting module having: a top horizontal bar assembly and a bottom horizontal bar assembly, wherein one end of each of the top horizontal bar assembly and the bottom horizontal bar assembly is connected with the first conducting bar, and the other end of each of the horizontal bar assembly and the bottom horizontal bar assembly is connected with the second conducting bar; multiple fixing balls (42, 44, 46, 48a, 48b) mounted on the top horizontal bar assembly and the bottom horizontal bar assembly and spaced apart to form multiple breakpoints; and multiple LED filaments (41, 43, 45, 47) mounted between the top horizontal bar assembly and the bottom horizontal bar assembly to form an alternating U-shaped series-connected circuit loop passing through the multiple LED filaments and the top horizontal bar assembly and the bottom horizontal bar assembly. a top horizontal bar assembly and a bottom horizontal bar assembly, wherein one end of each of the top horizontal bar assembly and the bottom horizontal bar assembly is connected with the first conducting bar, and the other end of each of the horizontal bar assembly and the bottom horizontal bar assembly is connected with the second conducting bar; multiple fixing balls (42, 44, 46, 48a, 48b) mounted on the top horizontal bar assembly and the bottom horizontal bar assembly and spaced apart to form multiple breakpoints; and multiple LED filaments (41, 43, 45, 47) mounted between the top horizontal bar assembly and the bottom horizontal bar assembly to form an alternating U-shaped series-connected circuit loop passing through the multiple LED filaments and the top horizontal bar assembly and the bottom horizontal bar assembly.