Gas acquisition apparatus and system

The invention discloses a gas acquisition apparatus and system. The gas acquisition apparatus comprises an acquisition probing rod and a sampling case. The acquisition probing rod comprises a sampling tube with a first end extending into a gas pipeline and a plurality of acquisition mouths extending out from the first end of the sampling tube. The sampling case comprises a first opening, an inner cavity communicated with a second end of the sampling tube and a sampling probe with a first end extending into the inner cavity through a second opening of the inner cavity, wherein the part, extending into the inner cavity, of the sampling probe is provided with a sampling opening, and a leading-out opening communicated with the sampling opening is arranged on a second end of the sampling probe. The plurality of acquisition mouths are in I-shaped distribution or annular distribution.