A pulse diagnosis device and a control method therefor, relating to the technical field of pulse diagnosis, and specifically aiming to solve the problem that an existing pulse diagnosis device cannot be well adapted to wrists of different sizes. The pulse diagnosis device comprises a housing (1), a cavity (2) which is formed in the housing (1) and accommodates a wrist (8), an airbag assembly provided between the cavity (2) and an inner wall of the housing (1), a controller (6) and an air pump assembly connected to the airbag assembly； the airbag assembly comprises one or more first airbags (31) and a second airbag (32) which are sequentially stacked from outside to inside, the first airbags (31) and the second airbag (32) each are provided with an air pressure sensor (53), a pulse diagnosis sensor (4) is provided on the side of the second airbag (32) facing the cavity (2), and the controller (6) can control the air pump assembly to inflate any one of the first airbags (31) and the second airbag (32) separately. The control method comprises first inflating the first airbags (31), and then inflating the second airbag (32), so that the airbag assembly has a wide range of deformation amounts to adapt to wrists (8) of different sizes, improving the comfort and pulse diagnosis accuracy.L'invention concerne un dispositif de diagnostic basé sur le pouls et un procédé de commande associé, se rapportant au domaine technique du diagnostic basé sur le pouls et visant en particulier à résoudre le problème selon lequel un dispositif de diagnostic basé sur le pouls existant ne peut pas être bien adapté aux poignets de différentes tailles. Le dispositif de diagnostic basé sur le pouls comprend un boîtier (1), une cavité (2) qui est formée dans le boîtier (1) et qui reçoit un poignet (8), un ensemble coussin gonflable disposé entre la cavité (2) et une paroi interne du boîtier (1), un dispositif de commande (6) et un ensemble pompe à air relié à l'ensemble coussin gonflable ； l'ense
