To make the display of the rotation of a three-dimensional image smooth even when a communication capacity is not large, or the number of terminals is increased.

In a three-dimensional image control server, a three-dimensional image rotation instruction 205 obtained by a three-dimensional image rotation instruction obtaining part 203 is transmitted by a three-dimensional image rotation instruction transmitting part 204. In a three-dimensional image display terminal 202, a rotational three-dimensional image signal 212 is generated by a rotational three-dimensional image signal generating means 211 of a three- dimensional image signal generating part 208 on the basis of three-dimensional image data 207 obtained by a three-dimensional image data obtaining part 206 and a three-dimensional image rotation instruction obtained by a three- dimensional image rotation instruction obtaining part 210.