Hypertension　and　cardiovascular　pathology　are　the　most　important　factors　causing　cardiovascular　diseases.　A　kind　of　monitoring　equipment　for　cardiovascular　function　to　evaluate　cardiovascular　pathology　is　urgently　needed　which　can　calculate　blood　pressure　and　report　pulse　wave.　The　piezoelectric　signal　collected　from　air　sac　on　wrist　was　processed　into　two　kinds　of　signals　including　pressure　of　air　sac　signal　and　pulse　wave　signal,　which　were　transferred　by　analog-to-digital　converter　into　microcontroller　unit　(MCU).　The　MCU　can　make　and　break　operation　of　the　pump　and　air　valve　to　calculate　the　pressure　in　air　sac　and　amplitude　of　the　pulse　wave　peak.　Finally,　the　MCU　can　calculate　mean　arterial　pressure　and　collect　radial　artery　pulse　wave.　Therefore,　the　device　can　collect　pulse　wave　on　the　constant　air　sac　pressure　which　is　mean　arterial　pressure.　This　device　can　provide　a　way　to　measure　pulse　wave　automatically　while　the　blood　pressure　is　measured.　©　2015　Taylor　&　Francis　Group,　London.